Renner portrays part of Affleck's bank robbing crew. He is the toughest and the meanest of the group, who doesn't seem to mine creating a few casualties for the cops when he is given the chance. Coughlin is a man who lives on the streets wanting to commit crimes, and would rather go out in barrage of gunfire than ever be sent to jail. Renner is very intense in this performance, in fact he is always intense no matter what the situation is. He always keeps his psychotic stare in almost every scene he is in.
Now what he does technically works well for his character, and the unnerved nature of his character works well and does at the right intensity to his scenes. Although I never really felt his performance was all that interesting. I understood his character completely from almost his first scene, and I found he really did not have much development past just his borderline psychotics. Yes Renner did his psychotics well, and he most certianly stole every scene from Affleck (not that much of an accomplishment in my opinion). I also did like his brief scenes where he tells about his refusal to ever go back to jail. He does show the right emotions in these scenes well. Yes he is most certainly good, but this performance just never became that overly compelling for me.
