I think this is a new genre that they're all sort of working their way through it and haven't got all the kinks worked out yet but it's a genre that works for me.

It's entirely possible that sending the audience out feeling lousy was intentional

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.

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.