The ambiguity of it all is at least as frustrating as it is intriguing, but director Brad Anderson whips it into something gorgeously terrifying, creating a sense of menace out of shadow and darkness the likes of which I’m not sure I’ve ever seen on film before.
Everyone else has been raptured. They’re in the Matrix. They’re actually the ones who are dead and can’t admit it. Aliens are playing a trick on Planet Earth.