Don't fall asleep. For this list, well be looking at the cinemas most terrifying dreams, daydreams, nightmares, visions and hallucinations. Our countdown includes Jacob's Ladder, The Burbs, Dumbo, Trainspotting, A Nightmare on Elm Street, and more! Whats your scariest nightmare? Let us know in the comments section down below.Watch more great scary videos here: Top 10 Urban Legends You Didn't Know About: