The closing lines of the TV show Candid Camera "Some day, somewhere, when you least except it, Someone may step up to you and say, "Smile, you're on Candid Camera!"" made quite an impression on me because I would think I was possibly being taped for Candid Camera. I would explain what I was doing for the benefit of the TV audience as I went about my day, waiting for Alan Funt to step out and say those famous words.
A childhood belief about being watched

others believed things like this
- I thought if you point the video camera at the TV then both the video camera and the TV will explode.
Anon - I used to believe,there was a little person inside my Dad's box Brownie camera.— Sandra R
- I used to put a camera along my fireplace on Christmas Eve in hopes to tape Santa.Anon
- Before the invention of the camera, everything looked like a cartoon with the quality/effect of oil painting.— MD Caruso
- I used to think that the laugh track on sitcoms were the camera men, directors, other actors, ect. laughing.Anon
- when i was younger i used to believe that if i step on the lines of the tiles i would die — arouf gangsta