I used to have a pillowcase which featured superheros on one side and supervillains on the other. I believed that if I slept with the supervillains side turned up, I would be attacked and killed by the supervillains, especially the dreaded Joker.
A childhood belief about under my bed

others believed things like this
- I used to believe that if I chewed on one side of my mouth too much the other side would get jealous.Anon
- the summer that I turned 11 I waited out side on the step all summer for my hogwarts letter... ;D — Ginny weasley... not really
- 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 everyone had a twin on the other side of the world.— tahnee
- I used 2 think that the scar on my side said "UNUSEABLE" LOL!!!!!!— John In Pennsylvania
- Until I was 23 I used to think the ginger put with sushi was a side of ham.— maari