Claustrophobia: Buried (2010)
I'm not afraid to admit that I'm afraid of confined spaces. In The Descent, characters crawl through a narrow cave system, and in The Cube, several future dead people make their way through a seemingly limitless series of identical cubes. Just typing these words is enough to make me reach for my Xanax.
But for those of you who, like me, suffer from claustrophobia, you must never, ever see Buried. In this movie, Paul (Ryan "Green Lantern" Reynolds), spends the movie buried alive in a coffin, with a cell phone, a few implements, and a dwindling oxygen supply. Hell, even if you don't have claustrophobia, I assure you that the trailer will have you gasping for breath.