Producer Peter McCarthy persuaded John Cusack, with whom he had worked before, to appear in the last big shoot-out scene as a delivery boy. He was shot multiple times and was burned by several of the nearly 20 squibs attached to his body. They didn't use the scene.
In the scene where Kalinga's wife (Eve Plumb) meets Jack Spade and the kids want to watch TV after finishing their homework, the theme song to The Brady Bunch (1969), in which Plumb played Jan Brady, can be heard in the background.
While Isaac Hayes and Jim Brown were on their way to the garage for their meeting, "Grazing In The Grass" by Friends of Distinction was playing on the car radio. In real life, Brown managed the group in the late 1960s.
When Slammer (Jim Brown) asks Jack Spade (Keenen Ivory Wayans), "What makes you think you can be a black hero?", Spade responds by saying, "I'm an ex-football player," and Slammer backs off. Brown played football for the Cleveland Browns from 1957-1965 and is in the NFL Hall of Fame. 'Bernie Casey' was also a professional football player before becoming an actor, as was 'Fred Williamson', another movie hero.