What scary dreams have you had?

What dream have you had at any point in your life that made you realy scared? If I can remember, I once had a ver short dream. I was in a room, and I was tied in a bed, and there were some kind of sharp knifes on top of me. Then, all of a sudden, the dude from Saw comes into the room, and he says "I am going to play a game with you.", then he pressed a button, and bang! Before the knifes touched my skin, I woke up. Though I could swear that I felt some pain lol....What is your experience?