The Departed is one of my favorite movies. Nicholson is a bit overbearing at times, but everyone else in the movie does work (including and almost especially Mark Wahlberg, who - Boogie Nights excepted - is usually on my "must avoid" list). The basic plot for those who haven't seen it, is that organized crime has a mole in the police, and the police have a mole in organized crime - simple setup, loads of tension.
Today's scene comes from the most tense scene of all of them.
On an unrelated note, I haven't seen Infernal Affairs, which The Departed is based off of. If anyone's seen it and has an opinion about it, I'm all ears.