Hellavator: The Bottled Fools (2005)
Director: Hiroki Yamaguchi
Stars: Luchiano Fujisaki, Yoshiichi Kawada, Ryôsuke Koshiba, Kae Minami
If you've ever been stuck in an elevator, you know that folks can get irrational real quick. Imagine a dystopian future where life takes place underground and all travel is conducted by elevator. Now imagine if something went wrong with that elevator. Now imagine that what went wrong with the elevator was engineered to create a "most dangerous game" scenario. We know it's hard, but now imagine that that's a movie.