I once thought that the toilet's flushing worked by creating a very small black hole. and if I didn't get out of the way fast enough, I would get hit with the Hawking radiation when i flushed the toilet.(I read a lot of scientific american and science news)
A childhood belief about fear of

others believed things like this
- I used to believe that if you didn't close the toilet lid after flushing, you would get sucked down into it.— Maya
- I used to believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G
- I used to believe that Limabeans would kill you if you didn't eat them.
I flushed them down the toilet.— Lima - I used to think if you didnt get up before flushing the toilet would eat you...Anon