If you've seen both this movie and The Walking Dead, it may be weird hearing Murphy speaking with a Southern accent/Daryl speaking with an Oirish accent. Or it may be weird seeing Scud shooting up bad guys, considering his insistence that "I'm a lover, not a fighter."
Crowning Moment of Heartwarming: In a shameless action flick, they're relatively rare, but a definite one is, when Murphy's dragged out by the Russian mobsters, he and Connor are yelling for each other, and then Connor rips the toilet out of the floor, climbs to the top of their tenement building, and drops it on the guy's head, because he tried to kill Murphy. Then he jumps down after it and lands on the other gunman, not even stopping to think of how easily the stunt could, and should, have killed him. If there was any question of how much the two brothers love and care for each other, this sequence answers it rather spectacularly.
Cult Classic: Maintains a devoted fanbase despite never being a commercial success and heavily panned by critics. The AV Club featured it on the their "New Cult Canon" list and cited Troy Duffy's inflated ego to be one of the things that made the movie particualrly infamous. Watching it on St. Patrick's Day has become a tradition and it is often used in drinking games.
Ho Yay: The hit on the Sick Mob Man, after which Connor puts his hand over Rocco's mouth, and kisses the back of his hand. Which doesn't even make sense in context, unless you count Rocco'simmediatesilence.
Maybe Magic, Maybe Mundane: The brothers and Rocco vs Il Duce. Is it God's intervention that none of the parties involved die in this epic meeting? Or is it simply because it's three self-admitted amateurs, up against a hit man who hasn't been able to actively maintain his skills for 25 years?
The hockey arena is a subtle callback to Greenly suggesting that their mass execution of the mob bosses take place center ice at a Bruin's game because of how public it will be. It's an homage to the passing of his character, as is the line "Thanks for coming out."
Narm: Special Agent Bloom's slightly lisping southern accent sounds just a wee bit like Truman Capote at times.
They Changed It, Now It Sucks: A lot of people were unhappy that Willem Defoe wouldn't be returning. Then he shows up in the last five minutes of the movie!