I cannot tell how they did it, but they succeeded in maintaining the tension for nearly 2 hours. Just like the main characters, we are kept in the dark what is going on exactly, and what the purpose is (if any) of what happens. It is not easy to fit this in any category: it is not Fantasy, not SF, not horror, but anyway the suspense is there and won't leave until the end.
Like everywhere else, several egoistic characters come and go. Some of them just disappear, while others come to a premature death. I cannot see a moral to the story. And what happens to the mother and the baby in the finale, is also not what we should have expected. This is something that I don't like in this film, and there may be a hidden meaning that I missed. Given that, the fact that I don't understand the title of the film, is a very minor issue.
