I gave this film a 9 out of 10, because it was exactly what I expected it to be.

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.

Each character in this movie — down to the smallest one — is an individual rather than a type, prone to spontaneous changes of mood and sometimes amusing outbursts of pettiness or ill humor.

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