When I was a child, our toilet was at the dark end of the house. For some inexplicable reason I thought that a puppet (Loobie Loo) from a popular children's pupet show - Andie Pandie - would grab me if I hadn't gotten away from the toilet before the flush finished.
A childhood belief about fear of

others believed things like this
- My brother (who was 6 at the time) would never flush the toilet in fear of our new house being blown up! Anon
- I used to beleve when i was 4 that the flush on the toilet was to wake up toilet monsters.— Millie
- i used to belive that when you flush a toilet on an aeroplane you get sucked down— milly
- I thought that toilet paper was bread and by puting it it the toilet i was feeding the ducks at the bottem.— Gringo
- 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