I don't know where I got this, it may have been a dream (or nightmare?) that I had that I incorporated into the real world.
When I was a kid, I saw "Willy Wonka and the Chocolate Factory" on TV. As I was growing up, I could swear that there is a scene after the little girl blows up into a blueberry where the Oompaloompas come in all with spoons in their hands, poke a hole in her side and start eating the blueberry jelly inside. This memory was so real to me that even as an adult I would tell my friends that that was the scariest part of the movie for me (it was very rare for movies to scare me as a child). When my wife (now ex) bought the movie for my kids, we sat and watched it together and I said, "Oh! They must have cut that part out!" When I explained to her what part they had cut out, she thought I was soooo wierd! It was at that point that I figured out that it must have been a bad dream I had after seeing the movie.
A childhood belief about films

others believed things like this
- I used to believe that if i bought a Wonka Bar I would find a golden ticket and get to see Willy Wonka.— Sally
- when i was little i believed that when we watched a movie people had to act the movie all over a gen.
— Emmer - I used to think that when a movie was 'based on a true story' it was happening for real then and there— Tom
- I use to beliee that if someone got shot or lost a limb in a movie they actually did in real life. Anon
- When I was a child, I used to believe that Catalonia was the unique part of land of the world.Anon
- Thanks to the movie "Annie", I thought hot dogs were made from real dogs. — Katie