As a child I was afraid to lie near the crack between my bed and the wall, because I believed that at night blind aligators climbed up and down the wall, but that they couldn't hurt you unless they felt you (since they were blind, I guess).
A childhood belief about under my bed

others believed things like this
- When a soldiers went AWOL in the movies, I thought they physically climbed over "A Wall".— D Rumsfeld
- I used to believe that blind dates were dates for people who were blind.Anon
- I was told that if you went to brd with your sox on you would go blind.— Frank L
- i used to think that if you were blind you had to have your eyes closed. Anon
- I used to believe that if you were blind you could wear glasses and you'd be able to see again— Jane
- I used to think that if you closed your eyes, you convince others that you were blind.— katie B