The Cabin in the Woods (2012) ending / spoiler
By the end, only Dana and Marty are left. They make their way down to the underground control room and let loose all the horror movie monsters meant as potential killers for them. The creatures kill all the workers. The Director of the whole operation tells Dana and Marty that the whole thing was a staged ritual to sacrifice people to the gods that ruled the Earth years ago and now reside underground. If the gods don't recieve a proper sacrifice, they rise and destroy the world. Dana considers killing Marty to save the world, but she is attacked by a werewolf. Marty fights the Director, who gets killed by a zombie. Bloody and battered, Dana and Marty share a joint as the gods rise to destroy the world.
Submitted by moviedragon