When I was little, I thought that when it rained, people in heaven were sitting on the edge of the clouds pouring buckets of water down to the earth below. I'm 28 now and still get that image from time to time.
A childhood belief about weather

others believed things like this
- When I was younger, I thought I could run and fall off the edge of the earth. Anon
- When I was young I used to believe that when it rained, God was peeing on the Earth. My grandma got mad.— Tim
- I used to believe that the whole world rained at the same time.— vannesa
- My older sister used to beleive that when it rained, the angels in heaven were having a spitting contest— Doblica W.
- When I saw that the clouds were moving in the sky, I thought it was because of the rotation of the earth.Anon
- Every time it thundered and rained I used to believe that God was passing wind and "peeing"!Anon