This film is a psychological thriller. As such, everything is not laid out neatly for the viewer. You will be left to figure out a few things on your own. If that doesn't sound appealing then you shouldn't watch this film. There's far more to this movie than two people screaming at each other in the desert, as some reviewers have written. I've rated over 500 movies on IMDb. This is the most underrated film I've come across. For best viewing, watch it without any preconceived ideas based around Hollywood formulas. If you're as much of a fan of psychological thrillers as I am, you won't be disappointed.