Most films are pretty linear and easy to follow in their story telling. Others are muddled, but make sense when you think about them — like Memento. But some, some are designed to bewilder, obfuscate, and confuse. These 15 films are all varying degrees of head-scratchers. Some you can pick apart with a bit of work, some you are deliberately impossible to understand, but all are worth the effort of the attempt. Oh yeah, spoilers.

15. Vanilla Sky

While personally I didn’t find this American remake of the Spanish psycho-thriller that bewildering, there were plenty who did, to the point where it was voted the most confusing film ever by a DVD rental company. The fact of the matter is that much of the perceived twistedness and confusion from the plot is all resolved by the classic cop out “it was all a dream.” While perhaps not as utterly blatant as that, but the entire film takes place in the lucid dream of a man in cryogenic suspensions whose subconscious has started to assert itself. That explains the constantly switching nature of reality, and the weirdness that surrounds him. There, easy.