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.

The best films of this genre always show a path and provide a takeaway for being a better person.

One of the most extraordinary films you will see this year. Take that as you want.

Exactly the movie you think it is, but not the movie you want it to be.