When I was very young, my mother once told me that as a child, she used to believe there was a creature resembling an alligator that lived under her bed. If she needed to get up in the night, she would stand on top of her bed and leap as far away from the edge as she could. When she told me this, I didn't believe that it was a monster or alligator. Instead I thought it was the Egyption God, Ammit, who ate unbalanced souls, and was described as having a crocodile's head. (I knew A LOT of weird ancient history as a child.) For many years, I too would leap onto and off my bed in fear of Ammit pulling me into the underworld & devouring my soul.
A childhood belief about under my bed

others believed things like this
- I used to believe that people born on leap year would only age once every 4 yearsAnon
- I was pretty small when Nixon was President. I thought "Watergate" was a type of alligator.— Ginger
- I used to believe Gatorade was made from alligator pee.Anon
- I used to believe that Steak was actually alligator meat. Anon
- I used to think gladiators were meant to be some sort of alligator.Anon
- When I was a child I used to believe that stand up pianos actually told jokes as well as playing music.— L MAN