There's a scene in the movie called The Incredibles, where the main character stamps the word "denied" on a piece of paper and an old lady says, "You're denying my claim?!".
Well, when I first saw the movie, I thought she was saying, "You're denying my *plane*?!" and wondered how on Earth someone could deny a plane.
A childhood belief about films

others believed things like this
- I thought Hurricane Dennis (in 2005) and the character Dennis from the Spongebob movie were related somehow.Anon
- if heavy people went on a plane i thought that it would tip over.— michael hague
- I thought that Heaven was literally up in the sky and you could fly there in a plane— Nate
- when i was little i believed that when we watched a movie people had to act the movie all over a gen.
— Emmer - when I was little, I was scared of taking the plane because I thought clods were solid !! — valentine a french student in eigth
- I thought that the jetstream from planes was white paint. Which was constantly poured out from the plane.— Tore