Finally watched this movie on Netflix. Recall there was a lot of hype around the movie when it was released. But why? It is a good production, great camera work, and ok to good acting, especially Sandra Bullock, but the plot is just too thin. Why does happen what happens? What's behind it? How does "it" operate the way it does? Sadly there are no answers. Answers are not necessarily needed, see The Shining, but one requires something instead. Here is nothing. Even the end makes you feel empty. 5/10