I used to believe that the people in the movie theater knew if your phone was on or not, and the "please silence your cell-phones" message would not go off until everyone did what they were told.
A childhood belief about films

others believed things like this
- Yep I thought the Zephyr song was fly away on my cell phone— Jenny
- I always thought that my relatives were really tiny, and inside my phone when I talked to them on the phone.Anon
- when i was little i believed that when we watched a movie people had to act the movie all over a gen.
— Emmer - I thought the women in Prisoner Cell Block H were actresses banged up in prison themselves.— Reb Kean
- I used to believe that the credits at the end of a movie was a list of people in that were watching it.— jon_
- I used to believe that all famous people knew each other.— Liz