When I was a child I used to play Zelda 2 on my Nintendo a lot. I was terribly scared of the "game over" screen with the red-and-black Gannon on it.
For years afterwards I was afraid that Gannon would pop out of my TV screen during the night and capture me.
(I have to admit that I still get the shivers when I hear the "nyuk nyuk nyuk" sound that belonged to that particular game over screen.)
A childhood belief about hobbies

others believed things like this
- I always thought you could break through the tv screen and walk into whatever was on the screen at the time.— Linda
- I used to believe that the game The Legend of Zelda: Twilight Princess was the longest game ever.Anon
- I used to believe that if I sat behind the tv set, my family could see me on the screen.— Jenny
- I used to belief that if you stood behind the TV, you would appear on the screen.— Gen Rodenis
- I used to believe that if I broke the glass on the tv screen, I could go into the tv show...— Karyne
- When I was little, I thought that if you stood behind the TV, you could see your insides on the screen.— C.W.