It was in the same vein as the original Escape from New York, which I would have listed except for the terrible remake they performed several years ago.
Maxpowers mentioned it earlier, but he didn't put it on the list.
One of the biggest mind-fuck films of all time, and truely an epic one at that.
-I need to check out Primer again. I saw it a few years ago on IFC at like 3 in the morning, but don't remember much of it. I know it was good, but seeing it in this thread certainly is a nice reminder.