I can't tell you what it is, you can never ask me about it later, and we're gonna hurt some people.

The Town (2010)

Not quite as compelling as Gone Baby Gone but fine work none-the-less, his second directorial effort cemented Affleck as a talent to watch.

It suffers a little from being a touch second hand. You've seen these dynamics in countless other movies about robbers and the cops after them. 

But an assured cast and a great sense of place mark it as above a lot of the similar takes on this genre.