Just watched this movie, and it's completely awesome and quite fucked up. Go watch it now. It stars Michael Caine and Emily Mortimer. British film, which is quite raw and violent... first half is quite slow, but the second half is great. Go watch it, I'm sure many here like this sort of movie.

Movie is about an old dude that has just lost everything he loves in his life, including his wife and then his best friend who got murdered. Then he gets the itch to go after the skum responsible for his death.

http://www.harrybrownthemovie.co.uk/
http://www.imdb.com/title/tt1289406/