this post was submitted on 18 May 2025
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[–] Opinionhaver@feddit.uk 73 points 4 days ago* (last edited 4 days ago) (3 children)

You don't need a huge wrench when working with the p-trap under the sink and water wont start spraying everywhere either as drains aren't pressurized.

Sprinklers react to heat, not smoke.

Not all spriklers go off at the same time in most systems. Only the sprinkler heads affected by heat.

The water coming out of sprinklers initially isn't clear but dark, rusty sludge. Sometimes even black as ink.

[–] pleasegoaway@lemm.ee 15 points 4 days ago

This is so informative.

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[–] NABDad@lemmy.world 61 points 4 days ago (15 children)

MRIs

Far too many movies and TV shows use the magnet to cover for their lazy writing by treating it like something that can be turned on and off like a light.

The magnet in an MRI is one of the coolest things in medicine, and writers get it wrong all the time. In the vast majority of cases, it's always on.

In simple terms, an electromagnet works by running a current in a circle and creating a magnetic field. In an MRI, the current is flowing in what is essentially a closed loop of wire. However, in this case the wire is cooled with liquid helium so it becomes a superconductor.

They induce a current in the wire which creates the magnetic field ("ramp up" the magnet). Because it is superconducting, the current doesn't stop. Once it's ramped up, it no longer requires any external power. As long as the current is flowing the magnetic field remains.

There are only two ways to "turn off" the magnet.

One way is to "ramp down". Essentially the opposite process that is used to get it running in the first place. That's what they do if they need to stop it for service.

The other way is to quench the magnet. You hit the emergency stop and vent off the liquid helium. Without the helium, the wire warms and resists the current and the flow stops.

Quenching a magnet is a magnificently dramatic process. Someone hits the panic button, and there is a loud roar as the helium escapes. Clouds of condensation form around the exterior of the building as the cold gas escapes. In the event some construction crew screwed up and accidentally sealed the vents, there could be an explosion from the rapidly expanding gas.

If writers want to use an MRI as a plot device, have an accident and require someone to quench the magnet to save a life. You'd have the immediate drama from the accident and the quench, and then you'd have the long term drama of the hospital trying to figure out where the money to fix the MRI would come from.

https://youtu.be/9SOUJP5dFEg

[–] Gerudo@lemm.ee 28 points 4 days ago (1 children)

I had no idea that once the current was in the magnet, no more power was required to keep it going.

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[–] OwlPaste@lemmy.world 15 points 4 days ago

That is insanely interesting never knew that

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[–] 1984@lemmy.today 60 points 4 days ago (3 children)

I work in IT so appearently i can just type override to get into any computer system. Cool..

[–] gilgameth@lemmy.world 35 points 4 days ago (1 children)

types three characters on a keyboard I'm in.

[–] phanto@lemmy.ca 26 points 4 days ago (5 children)

Guys... "sudo." Four characters.

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[–] sangriaferret@sh.itjust.works 51 points 4 days ago (4 children)

If any of the detectives from Law and Order come in to my bar I absolutely will not remember that random patron from five days ago.

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[–] NotAnotherLemmyUser@lemmy.world 48 points 4 days ago (2 children)

One thing that bothers me, and what everyone should know, is proper placement for defibrillator pads if you're using an AED.

It's not 2 pads on the chest, it's one pad on the upper chest (almost shoulder) on one side, and the other pad goes lower on their side. You're trying to have the current go through their heart (not skip over the top of their skin).

The AEDs found in public locations are all very easy to use and all have pictures for the proper placement. Just open it up and it will tell you everything you need to do. Have someone nearby look for one at the same time you're asking someone else to call emergency services.

They should all have razors if you need to get a little hair off (in case the person is especially hairy for one of the pad placements).

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[–] moody@lemmings.world 47 points 4 days ago

I was led to believe that shipping crates open up easily with one quick pry of a crowbar. In reality, those things are built with so many nails and screws that it takes more work to tear it down than to build it.

[–] TheFlopster@lemmy.world 43 points 4 days ago* (last edited 4 days ago) (4 children)

The number of people who are "knitting" in a movie or on TV...maybe 40% of them are actually doing it, and that's a high estimate (shout out to Miss Marple!). The rest appear to be wrapping yarn around one of the needles and then moving it vigorously, lol.

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[–] ChaosCoati@midwest.social 36 points 4 days ago (1 children)

using a red-tailed hawk call whenever a bald eagle is shown

also I like to try and figure out where they filmed based on the birds I hear in the background

[–] raltoid@lemmy.world 18 points 4 days ago* (last edited 4 days ago) (4 children)

It's actually very rare that Hollywood makes non-nature movies that use correct animal sounds(and it's often not correct in animal focused ones either). For birds they especially tend to use sounds that are exclusive to North America, even if the setting is in on another continent.

There's the classic of kids asking why they've never heard the "ribbit ribbit" sound in nature: The pacific tree frog only lives on the west coast of North America.

And let's not forget almost every single time you see a bear "roaring", it's almost always mixed in with lion roars and such. In real life a black bear "roar" sounds more like a cow going "moo".

[–] ChaosCoati@midwest.social 15 points 4 days ago (2 children)

laughing kookaburras as background “monkey” sounds in the Amazon jungle also get me

[–] GoodLuckToFriends@lemmy.today 12 points 4 days ago

God, yes! Once I learned about that I can never focus on the movie when they're playing that clip. Sort of like the wilhelm scream, but in a 'big sigh' moment rather than a humorous one.

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[–] jordanlund@lemmy.world 36 points 4 days ago (1 children)
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[–] Treczoks@lemmy.world 29 points 4 days ago (1 children)

About anything to do with computers. Anything.

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[–] Bwaz@lemmy.world 29 points 3 days ago (5 children)

Movies always show engineers and tech programmers as being young asocial nerds. We're not all young.

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[–] Canopyflyer@lemmy.world 28 points 3 days ago (1 children)

Hobby: Skydiving

  1. Free fall is at most 65 seconds on a normal jump. My personal record is jumping from 28,000 feet and I was in free fall for around 85 seconds. That's it, there is no such thing as a 5 minute free fall, unless you are looking to break an altitude record.

  2. If you run up to a skydiver and pull their Pilot Chute (PC) out and throw it into the wind, nothing will happen. The gear is designed to work at free fall speeds. A 10mph wind will not pull the main out. If you pull on the PC bridle hard enough to actually pull the main out of its compartment... You will just have a main parachute in its deployment bag closed by rubber bands, or other method and it will just be laying on the ground. You will also get a well deserved punch in the mouth by more than one jumper. If you pull the reserve handle you will probably get murdered and there will be no witnesses, especially if the hanger was full of jumpers. They will just hide your body and you will have deserved your fate.

  3. BASE jumping and Skydiving are as related as Hockey and Figure Skating. Sure there is some overlap, but one cannot do the other without training. Also BASE is an acronym. Building, Antenna, Span, Earth. Bridges fall under Span BTW. No, I am not a BASE jumper, although I have jumped the Bridge in WV. So yeah, I guess I have my S.

  4. Yes, wing suites are cool. Wish I had more jumps on them.

  5. You cannot talk in free fall. The old movie trope of talking back and forth is simply not possible. How difficult is it to talk in a car with the windows open going down the road at 70mph? Now, remove the windshield and drive the car 120mph...

  6. The "parachute not opening" is not even in the top 10 concerns when jumping. The gear works and we jump with two chutes. There is a whole lot of bullshit that can happen before we get to deployment altitude. Not the least of which is just getting to the DZ in the morning. I always considered my drive to the DZ my most dangerous part of the day. Second most dangerous is being in the airplane. I'm actually relieved to exit the aircraft as at that point I have a better chance of making it to the ground safely than the pilot.

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[–] LovableSidekick@lemmy.world 28 points 4 days ago* (last edited 4 days ago) (4 children)

Click click clickety-click... I'm in! Click click click... okay, I've hacked the corporate security system and unlocked all the doors, click click... here's the floor plan.

Can you disable the cameras?

Hang on... click click... okay you're good.

[–] MistressKitty@pawb.social 14 points 3 days ago (3 children)

The floor plan thing, in particular. Every time I change jobs, I search the company intranet for a layout so I can find my way around. The amount of hours I've wasted, to no avail...

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[–] vvilld@lemmy.dbzer0.com 27 points 3 days ago (8 children)

I'm an electrician who installs (mostly) commercial electrical systems, including fire alarm systems.

In most cases, pulling a fire alarm pull station doesn't set off the fire suppression sprinklers. The pull station just sets off the alarm and calls the Fire Department. Sprinklers aren't automatically activated. The water in the sprinkler pipes is under constant pressure. Sprinkler heads are just nozzles with a little heat-activated stopper in them. When that stopper heats enough, it breaks and opens the nozzle, allowing water to flow (they can also be broken by fucking with them or hitting them with something). But there's no mechanism that sets off other sprinkler heads when one goes off. Each head needs to be heat activated individually to go off. You see in movies and TV all the time someone pulling a pull station and that setting off sprinklers throughout the entire building, or someone lighting a fire in a small closet and that setting off sprinklers throughout the building. That simply isn't how they work.

(note: there are some fire suppression systems which do have remote activation, but those are not standard. They're usually used somewhere like a data center or a lab where there's extremely expensive stuff that you want to be sure doesn't get damaged. And those systems usually use a fire suppression foam or powder, rather than water.)

Also, the water in sprinkler pipes is NASTY. It's been sitting in those pipes for years, sometimes decades. It gets black and sludgy pretty quickly. It stains/destroys anything it touches.

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[–] phoenixz@lemmy.ca 27 points 4 days ago (7 children)

TL:DR: Everything? Like, literally everything.

If it's about driving? They're looking everywhere except the road in front of them

Computers? It's cringe, all I will say

Flying? Not even close

Brushing teeth? Put some tooth paste FFS!

Sex, perhaps? As bad as porn videos are at showing realistic sex situations, movies and especially TV shows are typically way worse with all the requirements to not accidentally show a nipple, omg!

Martial arts and fighting? The worst offenders. After twenty punches to the chest that will have broken half of the ribs, the protagonists now suddenly finds the strength in thinking about keeping his little girl safe and now he beats up 20 guys with those broken ribs

Being punched unconscious or getting some chloroform and they wake up the next day? Lolololollll. Humans are notoriously hard to keep them "out" without killing them, it's why anesthetists are paid so well, it's a very complicated job. When you're out from an impact to the head, you need medical attention, you likely have a minor amount of brain damage. If you're out for more than ten seconds, it's brain damage for sure. If you're out for over a minute, you're likely not waking up with full abilities, you're likely going to be a vegetable at best

Okay, doctors then? Saving a patient's life with the buzzer? Yeah no. When the heart stops, that defibrillator won't make it "go" again, the defib actually stops it in case of heart rithm problems. Also, CPR outside a hospital will result in death for about 90% of the cases, give or take, and Har % goes up by another 2 after 3 weeks later. The tiny % that does survive likely will have issues ranging from benign to being a benign vegetable.

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[–] KreekyBonez@lemm.ee 25 points 4 days ago (4 children)

there's a scene in "Silo" where a character needs to repair a massive steam-powered turbine that is off-balance, scraping at the housing, and heading towards collapse. all fine and we'll, it's sci-fi, so whatever, they can make magic quick fixes to move the plot along.

what really bugged me, for some reason, is how characters started touching the internal components immediately after it powers down - I have to wait for significantly smaller motors to cool off before handling them, especially if they're rotating poorly with a bad bearing, and burning from friction.

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[–] donuts@lemmy.world 25 points 4 days ago (4 children)

Gaming is apparently hitting all the buttons on the controller all the time

[–] Wytch@lemmy.zip 26 points 4 days ago (2 children)

Also you can just pick up a controller cold and start playing without any load times.

All video games sound like Super Mario Bros or Call of Duty. Alternatively (if video is shown), all video games are violent zombie shooters with terrible animation.

Only children use handhelds and they are all GameBoy.

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[–] abbadon420@lemm.ee 24 points 4 days ago (1 children)

Before Mr Robit, hacking was always portrayed as some action packed race against the clock with fast typing and a lot of meaningless, magic words.

[–] floo@retrolemmy.com 18 points 4 days ago* (last edited 4 days ago) (2 children)

This. Real hacking is actually quite boring, slow, and extremely time-consuming.

Also, I’ve never met a hacker that was nearly as hot as Remi Malik. Although I did get to meet him once while they were shooting a scene for Mr. robot outside of my friends apartment, and he was super Duper nice.

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[–] dumbass@leminal.space 22 points 4 days ago (3 children)

Retail workers spending the day doing shenanigans while barely doing any work, I'd kill for time to do some stupid time wasting shit.

Sorry I can't join your impromptu wedding for two workers whose name I forgot.

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[–] Valmond@lemmy.world 22 points 3 days ago (2 children)

Programming.

It's long and actually even longer.

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[–] invertedspear@lemm.ee 21 points 4 days ago (2 children)

I almost never see accurate sword fights. If they last more than two or three swings, they’re likely wrong. And Achilles jumping at the beginning of Troy was just comical. Footwork is so vital to sword play that leaving the ground is insane. But realistic sword play would be boring as fuck. It would be over in half a second and you would barely see any movement.

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[–] MrsDoyle@sh.itjust.works 21 points 4 days ago (1 children)

Pretty much everything. See "Bee Movie".

Fiction: Daddy bee goes to work in the honey factory every day.

Fact: Daddy bee has glorious sex once and immediately dies. Bachelor bee is booted out of the hive by his sisters in the autumn and dies.

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[–] NigelFrobisher@aussie.zone 20 points 3 days ago (1 children)

They think programmers are super smart and great at maths.

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[–] 11111one11111@lemmy.world 20 points 4 days ago (2 children)

Not really a hobby but I do hunt, so I find myself rolling my eyes when I hear 18 or more shots out of a pistol, 9 or more shots out of a shotgun and 31 ot more shots out of a semi-auto rifle with a pistol grips. The other eye roll is the unnecessary cocking and re-cocking of the shotgun without ever firing a round. If everything in the show Archer is true, then I may be on the spectrum lol. Except there's no fucking way I could dual focus counting rounds while shooting any gun even itmf its at the range and noone is shooting at me. Movie/tv tho im counting every one.

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[–] stelelor@lemmy.ca 19 points 3 days ago* (last edited 3 days ago) (5 children)

Hobby: Telescopes upside-down or back-to-front, pointed through windows, with aperture caps on, without eyepieces, under heavy light pollution and glare, magically show Hubble-level images of something only visible from the opposite hemisphere.

Job: The Government knows everything about you and any employee can pull up any info on anyone in seconds. Ffs we can't even get two departments to cooperate on a common database format.

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[–] kurcatovium@lemm.ee 19 points 4 days ago (3 children)

(IT, sort of sys-admin/remote help)

No, I'm not a programmer even though I sit by the PC. Also I can't magically fix any and all your computer related problems in a second I look at your PC.

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[–] themeatbridge@lemmy.world 18 points 3 days ago* (last edited 3 days ago) (4 children)

I used to work in organ transplants, and like literally everything related to organ transplants in film or tv is entirely wrong. Every medical drama, even the ones that pride themselves on realism, always try to make transplants and donation more dramatic, which is absurd when you consider how dramatic the reality actually is.

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[–] GrayBackgroundMusic@lemm.ee 17 points 4 days ago (3 children)

3d printing - it prints flawlessly and the first time.

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[–] GoodLuckToFriends@lemmy.today 16 points 4 days ago* (last edited 4 days ago)

I'm actually pleasantly surprised by how much movies get right with rowing and sailing in movies.

The one that does make me roll my eyes is the scenes where characters are chilling in the galley or bed and then suddenly run up because they hear/see a problem through a porthole. I always get pretty grumpy with the idea of folks being actively under sail and simply 'tying' the wheel or tiller and going under the deck. Only the incredibly expensive sailboats can truly get away with that. A small, affordable to a middle class type, yacht will have that with a motor, but sails are not so forgiving. If the wind changes you could have a pretty bad day, and even a perfectly 'straight' tiller will likely have you turning circles ere long. That's not even considering how poor of a decision that would be unless you were a military ship in the middle of the ocean and others would get out of your way. Just because collisions are super de duper unlikely doesn't mean they're impossible.

[–] GoofSchmoofer@lemmy.world 15 points 3 days ago* (last edited 3 days ago) (1 children)

it's neither a hobby or a job But the trope that a very complicated, very dangerous situation can be solved by just one person and a gun.

It's unfortunately so ingrained into the Hollywood story lines that people, especially in the US, think that that's reality.

The idea of the rugged individual has destroyed the idea of societal support to the point that some people are actually terrified to ask for help in anyway.

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[–] yarr@feddit.nl 15 points 3 days ago (6 children)

Aside from Mr. Robot, almost every show that features software or computers completely butchers the details. My favorite offender? Mythic Quest. The main cast supposedly runs a massive MMORPG, yet their day-to-day activities have almost nothing to do with how game development or even basic software work actually functions.

It is like if ER was about hospital staff moving random boxes labeled "coils" back and forth while claiming to perform life-saving surgery. That is how far off it feels.

What really gets me is that Mr. Robot proved it is possible to do it right. If you treat the subject matter with respect, you can absolutely make something compelling and realistic. But since it is all just "nerd stuff" to most writers, and none of them are C++ goblins, we get tech scenes written by people who probably think JSON is a fitness drink.

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[–] captain_aggravated@sh.itjust.works 15 points 4 days ago (3 children)

Hobby: Video gaming.

Try to determine what kind of video game a movie character is playing by what they're doing to the controller.

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[–] Kolanaki@pawb.social 15 points 4 days ago (1 children)

I am so used to seeing movies or shows depicting someone playing a video game on the screen that is for one system, but the controller in their hand is for a totally different system.

You ain't fooling anyone when the dude is playing Super Mario with a Genesis controller. 😬

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[–] grasshopper_mouse@lemmy.world 14 points 4 days ago (3 children)

Having served in the U.S. military, I cannot unsee the fact that movies and TV shows ALWAYS fuck something up with the character uniforms-- Army rank on Air Force cadets, upside-down rank, badges pinned on the wrong side, the character is a Sergeant Major but they're wearing Major rank, the character is wearing ribbons for wars they weren't even alive to have served in, and so on.

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[–] yesman@lemmy.world 14 points 4 days ago

Oxygen tanks are not bombs. They won't explode or shoot fire. The reason they're painted green is because oxygen is non-flammable. (those red acetylene tanks however, are scary)

Now obviously any existing fire can be made much worse with oxygen, but it's not enough on it's own.

[–] pineapplelover@lemm.ee 14 points 3 days ago* (last edited 3 days ago) (1 children)

I started IT thinking it was genuinely telling people to turn their computers off and on again. I feel that's like a 1% though. Most of the times it's actual issues. At my work some stuff is hardware, web, databases and I wasn't expecting this when I first started.

Thanks IT Crowd

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[–] Nemo@slrpnk.net 13 points 4 days ago (1 children)

Waiting and Party Down were both great about depicting the experience of food service, but gay men and Latinos were criminally underrepresented in both.

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[–] SlippiHUD@lemmy.world 13 points 4 days ago

I have not unlocked a single chasity belt, it doesnt even come up as a service they might need.

[–] phdepressed@sh.itjust.works 12 points 4 days ago

Basically all science but particularly biology. I'm not sure I've ever seen accuracy regarding well anything outside parts of gattica.

Assays that can't be sped up, sped up. Machines doing 5 things other than what they're actually built for. Gloves, no gloves at wrong times. Terrible technique, etc.

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