Fascinating, but with a smart-ass and silly ending

Rating: 6/10 (17 August 2014)

I found this film gripping and fascinating.
A mystery and clues that emerge along the route.
You see the dynamics of the group and how it evolves.
How do people behave under pressure? But I had also expected that there would be some sort of coherent explanation.
At the end it just ends and you are supposed to see that as clever.
Really there is no explanation.
Just a hint of an absurd answer which It spoiled my belief in the story as a whole.
I did not believe it.
Stylish but in the end incoherent.