I used to think (when I was really young) that as soon as I flushed the toilet, a monster would come out of it and kill me. So I would always run really fast away from the toilet whenever I flushed it so they couldn't get me!
A childhood belief about fear of

others believed things like this
- 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 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 the toilet would suck me down if I flushed it.— :-)
- i use to believe that if i flushed the toilet when i was still on it would suck me down to who knows whereAnon