An overly madcap, mildly amusing but eventually tedious comedy about a pathological liar (Matt Damon) turned whistleblower.  While the movie is no great shakes, Damon’s performance is excellent, and he manages to inject some humanity into what is a butt-of-a-joke, one-note character.  Given his performances from The Talented Mr. Ripley through The Departed, Damon seems never to be given the credit he is due.