This is such a great, yet horribly underrated movie. It's creepy, and intense. Not to mention some really amazing character development and a really dreadful sensation throughout. Instead of playing on the overused "there's someone watching us" tone, it brings about a much more terrifying feeling of "nobody is watching." I think this is an amazing movie. My only complaint is that it feels way too short. Sometimes, things happen way too fast, and the pacing feels a little too quick. But, aside from that, this is an amazing characters study that reveals what happens when we are left with nothing but our primal instincts.