When I was a little kid, we had a BIG walk in closet at the end of our hallway, right next to our bathroom. I was 100% convinced that a monster lived in that closet, and that every time you flushed the toilet, you woke him up and the sound of the water banging in the pipes after you flushed was really him trying to break out of the closet. The few times i was brave enough to actually flush the toilet, I would run into my room as fast as I could and hide under the blankets until the banging stopped.
A childhood belief about fear of

others believed things like this
- 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 believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to think that the sound after the toilet was flushed was ladies singingAnon
- I used to beleive that if you flushed the toilet that it would explode and all the water would shoot out.— Michelle
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G
- That captain hook lived in my closet on the very top shelf.Anon