This film has one of the most compelling premises and buildups in of any film in recent years.

However, the ending left me rather cool and I felt that a story with such a gripping narrative should have something a little more well thought out.

It's almost as if there is a genre switch near the end of the film. Where it goes from psychological drama to cartoonish over the top horror. I'm interested to know if there was studio intervention on this point because it almost feels like another filmmaker took over.

Unfortunately, this bend basically broke the reality of the film for me. But the primary build up of the film is so great its still definitely worth a watch.