When I was a kid, I used to believe that at the bottom of Foam Pits in gyms lived crabs and scorpians. So whenever i jumped into the pit i would always squirm and struggle to get out as fast as I can.
A childhood belief about monsters

others believed things like this
- I used to believe that if you swallowed cherry pits, you would have a tree growing in your stomach.— porkchop
- I used to believe that elfs lived in the hedge at the bottom of my garden!!
— The milky bargirl - A friend of mine thought that some olives grew with red edible pits (pimentos).— HA
- I used to believe that the foam that sometimes washes up on the beach was shark saliva... — Tiffany
- i used to think that the foam in the ocean was whipped cream. until i tasted itAnon
- i used to believe that the white foam on the surface of the ocean were unicorns trying to escape.— intunedwithmagic