My mother told me that if I coughed too hard my lungs would flop out. So you must put your hand in front of your mouth to stop them otherwise they won't go back in again.
A childhood belief about general

others believed things like this
- When I was i kid I used to believe that if i strained too hard while doin #2 I would poop my lungs out...— K.Gordon
- when i was younger (8 or 9) and i farted my dad used to tell me not to worry, that my bum just coughed.— james
- I used to think that foreign people coughed and sneezed in a different language.— Even more stupid
- when i was little i used to beleive that if i coughed, sneezed and farted at the same time i would blow up— fart
- My teacher held out a hand to say, "stop" but I thought she wanted a high-five.Anon
- I also thought that people in different countries coughed, sneezed, laughed, or cried in their own language!— Mini