When I was younger, someone told me that if you have one of those "falling dreams" (you know where you think you are falling over something, and you jolt yourself awake) and you really hit the ground, you would die. I was afraid to go to sleep after that.
A childhood belief about sleeping

others believed things like this
- I used to believe that if you dreamed you were falling and you hit the ground, you'd die in your sleep.— Knoot
- I, to this day, believe that when I can't sleep at night it means I'm awake in someone else's dreams... — Turner
- I used to believe as a child that t-storms (aka thunderstorms) where actually tea bags falling from the sky.— Samantha
- I used to think that dreams were events that really happened, I just couldn't remember them when I was awake.— Warren
- I used to believe that sattelite dishes were used to shot down falling meteors that fell to earth.Anon
- I used to believe that falling leaves were dead butterflies, and I always buried them in the back yeard.— waters