This movie is pretty neat: the twist (usually held until act three) is given early on to the audience, and the protagonists are in the dark until, well…maybe too late for them to do anything with that knowledge. The characters are written in a generic manner on purpose, and the setting is generic on purpose, but the viewer get invested enough in their plight to find out what happens at the end. And act three is a frenzied, fun freak-out of mayhem and carnage.