My father worked in an auto parts plant and would tell us about the dirty, oily machines and vats he had to work around. One time he was talking about a conversation he had with his co-worker about being assigned to a particularly unwelcome task, and he said, "You don't want to work near that machine, there's oil snakes and all sorts of things down in there!"
Being a little kid, I didn't realize he was just being facetious with his co-workerl so for quite a few years, I believed there were actually "oil snakes" that lived among the machinery he worked on. I don't know why I thought an auto parts factory would have snakes in the machinery, guess I just never thought about it...
A childhood belief about technology

others believed things like this
- I once thought that snakes had legs like a centipede.Anon
- I thought all snakes were venomous and you always die if you get bit by a snake— Elviessa
- When I was little I believed little men and little women worked inside my body to make everything work.— Ashley
- I used to believe that snakes don't have legs cause ants bit them of.— Lulzy
- When I was five, I used to believe that worms grow into snakes.— Mz Dimple
- I belived that when I took a crap, my turd(s) would turn into snakes and bite my booty.— Butters.