Army of Darkness (1992)

Ash defeats the Evil Dead with the help of King Arthur, his tricked-out Chevy, and the chainsaw attached to his arm. He then is given a potion, which depending on the version you're watching, either sends him into the future, a blasted wasteland with no hope of escape, or back to the S-Mart, and one final encounter with the undead. Ash wins. In the director's cut of the film Ash is instructed to take 6 drops of a magic potion and he will awaken in his own time. He accidently takes to many drops and wakes up in London far into the future to find everything destroyed.