If the ambition is to provide two hours of instantly forgettable, popcorn-munching escapism, it succeeds.

After playing with our expectations, this turns out to be a very different sort of film.

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

A film of deceptively outspoken contemporary relevance, this is cinema at its most alert, alarming and alive.