Instead, you get a movie that's enjoyable enough, but leaves you feeling like it could have been much, much more.

This is a must-see and one of the best documentaries - and films - of this year.

It's funny, it's tense, it features two great performances from two actors and the director expertly creates a web of odd tension where you actually don't know what is happening for the majority of the run time.

Story: It's very simple but honestly that is fine.