When I was about 5 my parents told me not to stick me arm out the window when travelling in the car as it might be cut off by oncoming traffic. So then I figured that if you stuck your arm out of the window a chainsaw popped out of the oncoming cars bonnet which then cut off your arm. I believed this for a few years.
A childhood belief about cars

others believed things like this
- i used to beleive that a traffic jam was wen cars got stuck in jam!Anon
- i used to believe that a elf familly lived on my window, long after a new my parents were Santa Claus— anna
- that if you stuck out your tongue at your mother, your hand would stick up out of the grave when you died.— Elaine. London
- My mom used to tell us kids that if you put your arm out of the car window,that it would fall off.— Kathy G.
- I used to believe that the moon lived on top of our house because I could always see it from the window.— Classic NYer
- When I was little I thought a widow was someone who stares at you through a windowAnon