After I saw the movie "The Truman Show", I thought for years and years afterward that I, too, was being filmed in my every move. I would look into the mirror and say: "I know you're watching me!" I was always afraid to undress, because I thought that the scary Kristoff guy was a pervert and would spy on me. I talked to the film people a lot, and my mom once asked me why I talked to myself..
Coincidentally, a female friend of mine also believed the exact same thing, and once we set out to try to escape the "fake world". We were unsuccessful.
A childhood belief about i'm different

you weren't the only one
57 of you believed this