Channel Hop: On both an interview, and the DVD Commentary for The Criterion Collection, Spike Lee says that the project was originally at Paramount, but the studio was worried about the climax and wanted it toned down. Lee refused and, in the same weekend Paramount turned the project down, Universal Pictures picked it up for distribution.
Darkhorse Casting: Rosie Perez was cast as Tina after Spike Lee saw her dancing at a Los Angeles dance club. Perez decided to take the part because her sister lived four blocks from the set. She had never been in a film before and became upset during the filming of Radio Raheem's death scene.
Inspiration for the Work: Spike Lee first got the idea for the film after watching the Alfred Hitchcock Presents episode "Shopping for Death," in which the main characters discuss their theory that hot weather increases violent tendencies. He was also inspired by the 1986 Howard Beach racial incident, in which an African-American teenager was killed; and also the shooting of Eleanor Bumpurs by police.
Irony as She Is Cast: The scene in which Sal and Buggin' Out argue about there being no "brothers" on the wall of the restaurant, only "American Italians", is ironic due to the fact that Giancarlo Esposito is half Italian, being that his father is originally from Napoli.
Spike Lee's first choice for Sal was Robert De Niro, who turned it down because he felt the role was too similar to ones he had played in the past. Joe Mantegna and Joe Pesci were also considered.
Delroy Lindo was offered the chance to audition as one of the "Corner Men" but turned it down.
In the original scripted ending, Sal and Mookie reconcile. Sal, although upset, tells Mookie that he understands that Mookie had to do the right thing. Spike Lee changed the ending during filming and has never explained why he did, though it does make the ending more morally ambiguous.
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Barack Obama and his future first lady Michelle saw this film on their first date.