good back-story, and good acting

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

It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.

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.