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

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 film's masterful storytelling did its job. The message was clear. No need to overdo.

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