First of all, it makes no sense. The entire movie is built on you just to be terribly afraid and have no idea what's going on. And this is how it works, that's the only thing the director has done, and he almost succeeded. The rest of the movie is boring, uninteresting and totally meaningless. It is true, that there were moments, in which you were afraid. But suddenly, another take of the movie has changed your expectations, unfortunately not for the better. The final scene was a complete insult to human understanding and I would really like to get some explanation, which i did not get in the movie. It was all very badly elaborated and miserable. It might be better, if the director first thought out, what he wanted to do.