I believed that if you hung upside down for 30 minutes or if you sneeze while hanging upside down then your head would explode
A childhood belief about general

others believed things like this
- My dad always told me to never hold my sneeze and if I did, then my head will explode.— anon.
- Like most kids growing up, I believed there was an upside-down word on the other side of the mirror.— Taylor (14)
- i used to believe that a volcano was an upside-down UFO in disguise— Sally
- I used to believe that if you ate a grape upside down it would come out your nose.— Cath
- i thought if you dialed 666 you got upside down policemen.— rufus
- When I was a child I used to believe that if some shoe was upside down, someone in my family could die.— Camila C.