I just watched the Babadook. Really fucking scary...up until the ending where the horror that was so effective throughout the movie is gone when [spoiler]it's revealed the Babadook is a real monster and not the result of the mother's imagination. The film worked up till that point because it was never clear if the monster was real, aside from maybe one scene which hinted at it.[/spoiler] While I don't think the movie is bad by any stretch, it's absolutely terrifying, I think if the film were far more ambiguous, it would have been way scarier and way more effective conveying its message.