Man, this was so good until an ending that just fell flat. Every great story, and especially every great ending, has a feeling of inevitability. Unfortunately, the last 15-20 minutes of Under the Skin felt random and arbitrary, and the power that had been building fizzles out.
There's certainly a good idea in the hunter becoming the hunted, but I found the odds of the woman wandering into the forest and happening to cross paths with a rapist a bit of a stretch. And then when that rapist gets a glimpse of what she really is he has the will and determination to run all the way back to his truck, get some gasoline, run back, and light her on fire. I didn't buy it. Not at all.
It's too bad, because until this point the film is really something special. Great imagery, sound, score, and a stellar performance by Johansson.