Memento. First of all, whenever he gets in his car to drive somewhere, how does he remember where he is going? Especially at the end when he pulls up in front of a tattoo parlor? How did he remember it was there?
Second of all, [spoiler]how does he remember the story about Sammy Jankis? If it was actually about him, then it happened after he lost his ability to make memories, so therefore he wouldn't be able to remember it.[/spoiler]
There are tons of things that don't make sense in this movie. Christopher Nolan sucks at making movies without huge holes in them.