If I'm to believe that second person didn't misspeak, they had "mental breakdowns" with an "s", so multiple breakdowns, over the thought that their eating lettuce could cause a nuclear apocalypse.
They must really like lettuce. If I had a mental breakdown over the fear that my eating a specific food would cause untold human death and suffering, including my own, I would likely not eat that food again until I could convince myself it was safe.
