Stephen King is great. But not in the middle of the night, in the dark, alone, in a new pair of underwear.
Many other things have scared me out of my wits more than these horror books and movies, such as:
When your siblings leave, and then return. Terrifying.
When the teacher walks through the door.
Your parents begin a story of, "When I was your age..." I mean come on, your parents as a teenager actually having a life? Petrifying.