Saw the movie Memento last night, it is directed by Christopher Nolan, who directed The Prestige, Batman Begins and The Dark Knight. I guess I would classify it as a thriller, the film is about the character Leonard who has anterograde amnesia after a severe head trauma during the attack of his wife, it basically means he can make no new memories after the attack, but he still remembers everything before it. The story is told in reverse order of what has happened to him in trying to find his wife's killer.
Really awesome movie, the way the movie is structured is just awesome, lots of twists and turns as well, some character seem bad when you first see them, and some seem like they are helping him, but it gets flipped on its head by the end. I highly recommend it.