The public elementary school I attended was next to a private parochial school. That school's main building hard a large vent pipe coming out of the roof. "Everybody knew" that on St. Patrick's Day, a huge green ghostly hand would appear out of that vent pipe to throw rocks at you.
A childhood belief about monsters

others believed things like this
- When I was in elementary school I use to think that teacher lived at school at their desks all year long.Anon
- When I was in elementary school nuns cam to our school. I thought that 'nun' meant they had no religion.Anon
- I believe that there is a monster in the air vent and watches me when I put on my clothes— Blablabla
- I once thought a vent in my hotel room led down to the center of the earth.— flarn2006
- I used to think my elementary school gym teacher's name was "Jim Class".— Brandon Campbell
- When I was in elementary school, I believed my heart moved across my chest throughout the day.— Allison