A three-part piece: Bare-Knuckle Boxing (7:55): A closer look into Damon's intense physical training for hand-to-hand combat scenes in the film. Close Quarters (4:27): A detailed look at one of the movie's key locations and crafting another one of the movie's major fight scenes and Underground Rumble (5:59): Making the movie's climactic fight sequence, with equal emphasis on the fight's dramatic relevance.