As a small kid I was told once by my grand father that 'Troll's' lived under small foot bridges and from then on I was scared to death every time I had to walk over a foot bridge.
A childhood belief about monsters

others believed things like this
- I used to belive that if i put my foot in my mouth, I would get foot-and-mouth illness— Emily Sathrota
- When I was little I was conviced if you said twinkee in a mirror 3 time a foot would appear. Anon
- My Grand father told me that if i swallowed chewing gum i would stick to the toilet— Mr Jones
- I used to believe that "Earwigs lived in your ears", scared
me to death for years.— Will Chapman - When i was small i used to think god lived on top of my house and the devil lived right underneath it.— Missuss D
- When i was little i used to think that my foot was a "naughty part" that no one else was supposed to see.Anon