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.

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

Blistering performances.