I used to think that there was a monster with a knife under my bed and if I ever slept on my back he would pop up and hurt me with his knife. I don't know how I ever thought up of that.
A childhood belief about under my bed

others believed things like this
- I used to believe Chucky would come out of my toilet, stab me with a knife, and kill me. :(
I hate Chucky. — Bijan - I used to only sleep on my back because I thought I would break my ribs if I slept on my stomach.— Molly
- I remember back in sunday school that if you stomped on the ground you would hurt satan. Anon
- I thought the boogey monster was a monster that ate boogers at night in front of youAnon
- I called every body part my elbow. For example if my leg hurt I would say my elbow hurt.— Kady
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl