For some reason, whenever I was in a room without an adult, I always used to think there were some sort of monsters in there.
Any time my mom would ask me to go downstairs to help her out with something and the lights were off, I would run down the stairs, do whatever it was she asked me to do, then run back up the stairs ten times quicker.
I believed that whatever was down there was going to prevent me from running up the stairs and would suck me back down.
A childhood belief about monsters

others believed things like this
- I would turn the lights off and then leg it up the stairs thinking a monster would be chasing me.Anon
- I used to believe I could fly when I was about four, until I fell down the stairs.— Sarah
- I used to think you could die if you jumped half way down the stairs. Anon
- I used to believe that if I went down the stairs slowly a red eyed skeleton would come and run after me.— Melly2bee
- I used to believe that it was the law to hold the railing when you're walking down/up stairs— Brit
- I used to believe I could fly.
All I had todo was step of a flight of stairs and I'd be walking in the air...— Dolly