I used to believe there was a giant slime-covered hand down the toilet which would grab you and pull you down it if you sat there too long.
A childhood belief about fear of

others believed things like this
- i used to believe that scoripons could crawl up your toilet and pull you in.
No thanks to my big brother!— Alexandra - You couldn't have your belly button covered for too long or it would be harder for you to breathe.— Jess
- I got given a box of slime marked "alien puke" and asked if E.T. was all right.Anon
- I used to believe that if I sat on the toilet too long a snake would come up and bite me.— Cheesemonkey
- I used to think that my right hand wasn't my right hand anymore if I turned around.— Mike
- I used to believe that the boogieman was a big mean guy covered in boogers.— Ethan