After watching a Twilight Zone episode, I believed if I slept too close to the wall, I would fall through to another dimension.
A childhood belief about sleeping

others believed things like this
- When i was little, i believed that if you slept with socks on, your feet would fall off.Anon
- 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 you jump in a toilet, they lead you to another dimension.— beep.
- I used to believed that when I went to sleep my heart took a rest too, and didn't pump at all while I slept.— Lara
- I believed that leaves on trees only became individual when you you close to them, and then I got glasses.— nola
- i used to believe dragon ball z was real
and namek was in another dimension
and every show on tv was realAnon