Trivia: The word "fuck" and its derivatives are used a total of 246 times.
Trivia: The door to the porno club says, "Abandon hope all ye who enter," the same words on the sign to Hell in The Divine Comedy by Dante Alighieri.
Trivia: The actor who portrays "Vincenzo Lipazzi" (Yakavetta's right hand man), Ron Jeremy, is actually an adult film actor/producer.
Trivia: When the brothers and Rocco battle Il Duce, Willem Dafoe falls to his knees with his arms raised, composing the classical music in the background as he visualizes the actions. This closely resembles Dafoe's death scene from Platoon (1986).
Trivia: When transposed, the first couple letters of Agent Paul Smecker's name change to "Smaul Pecker" (Small Pecker).
Trivia: The Boondock Saints is also the name of writer/director Troy Duffy's band.
Trivia: At one point Patrick Swayze, Stephen Dorff, and Robert De Niro were each slated to act in this movie.
Answer: The song is titled "Indigino" it's a foreign techno song by "The Chidros".