Memorable, crazy movie

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.

The film never slows down or bores, plunging from one harrowing sequence to the next.

It's funny, it's tense, it features two great performances from two actors and the director expertly creates a web of odd tension where you actually don't know what is happening for the majority of the run time.