I used to believe that thunder was when the sky belched really loundly. During storms, I thought the sky was being needlessly rude, and sometimes was so offended that I would run to mom to "tell on" the sky. She thought it was funny.
A childhood belief about thunder and lightning

others believed things like this
- I held my breath near cemeteries because I thought it would be rude to inhale spirits. Anon
- I used to believe as a child that t-storms (aka thunderstorms) where actually tea bags falling from the sky.— Samantha
- When I was little I thought that thunder was the bricks of our house banging together for some reason.— Ncik
- I always thought thunder was the sound of the crumbling buildings, after lightning had struck them.Anon
- when i was younger i thought ac/dc's dirty deeds (done dirt cheap), was dirty knees and the thunder cheeks.— S
- As a child, my twin sister and I used to pronounce `Spaghetti' as `Mastaghetti'. Sounds a bit rude, no? Anon