Lack of good storyline.

This story has more twists and turns than a second-rate soap opera.

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.

One of the film's great tricks is that, for a time, you think it will go down a rabbit hole of unrealistic glorification.