I had a friend who told me that her family had seen a dinosaur in our local lake when they were out fishing one day. She claimed they had taken pictures but "hadn't gotten them developed yet." When I asked about the pictures sometimes later she said that they hadn't turned out. I still believed her for a long time though, even without the proof.
A childhood belief about monsters

others believed things like this
- I used to believe that everyone in pictures could see me so i turned all of the pictures in my house backwardsAnon
- I used to believe that a long time ago, just like in old pictures, the world was black and white loolAnon
- I believed that the pictures on my nighties came alive at night and played in my room while i was asleep!!Anon
- I used to think that if you didn't have a birth mark you hadn't been born.— Kim
- I used to believe photosynthesis had something to do with pictures. Heh.— Sessee
- I thought if someone hadn't passed the Law of Gravity, we would all be floating around in space.— Trudee