For a very long time when I was little I used to believe that those big plastic containers on top of some cars(used to pack things) contained dead people being taken to the cemetery. I guess it was because I'd never been told otherwise and they're about the same size as a coffin.
A childhood belief about cars

others believed things like this
- I used to believe that I couldn't pass by the cemetery at night because the dead people would wake up.— Marcos Carvalho
- I thought that dead people were stuffed INSIDE their gravestone instead of buried in a coffin.— Sam Shiels
- I used to believe, driving in front of all the other cars on the highway, Knight Rider was leading the pack.— Michael Kolassa
- I thought that people were like cars because cars have exhaust pipes, and people fart.— Matt
- I used to believe that a street sign that read "Dead End" meant that there were dead people buried there.Anon
- I used to think that doctors added plastic to your face in plastic surgery.— caro