I was told as a child that thunder is caused by angels shoving furniture down the stairs, rain was caused by God taking a shower and lighting was caused by the rainwater running into God's electricity supply causing it to blow up. I forget what terminology I used though. Oh well.
A childhood belief about thunder and lightning

others believed things like this
- I think lightning and thunder is caused by angels throwing temper tantrums Anon
- My dad thought when he was little, rain was caused by army guys in the clouds with rain guns. — Daughter of the Weird
- I used to think that rain was caused by the sun peeing on us.Anon
- When I was about three, I used to believe that the rain was caused by Jesus' peeing down on the earth!— Gretchen
- When I was a kid, I used to believe that windmills were what caused the wind to blow. silly me :)— Adrian Z. Ontario, CA USA
- I used to believe that the trees moving caused the wind to blow.— naomi