Primer
If you like movies like Memento, that is. It's actually a lot harder to follow than Memento. I think I'll need to watch it a second time just to figure out what is going on. Basically, two brilliant engineers are trying to create a technology start-up, and they inadvertantly build a machine that allows them to travel back in time a few hours. And run into the typical philosophical and real problems time travellers have to deal with.
The movie is almost a pure intellectual exercise, and it is emotionally barren as the Mojave.
But it is also the coolest Indie film I have seen in a long time.