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Trivia: The topless girl at the mobsters' pool party is future "Three's Company" TV star Suzanne Somers.
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Trivia: Yul Brynner, The Man in Black, has only 9 lines of dialogue throughout the movie, only 32 words. In the first saloon scene, Brynner intentionally bumps Richard Benjamin and says, "Sloppy with your drink"; after some silence, Brynner says to the bartender, "Get this boy a bib"; a few moments later, Brynner taunts again, "He needs his momma"; Benjamin finally summons the courage to speak, and Brynner replies, "You say something, boy?" Benjamin says Brynner talks too much, and Brynner challenges, "Why don't you make me shut up?" Whereupon, the two men square off for a duel, and Brynner finally says, "Your move." Later, about half-way through the film, when the Man in Black invades their hotel room, Richard Benjamin overhears Yul Brynner say the line "Not a word" to James Brolin. Even later, Brynner challenges Benjamin and Brolin in the street: Brynner first says, "Hold it," and shoots Brolin dead; Brynner then smiles at Benjamin and says, "Draw."
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Trivia: The two boys who are sitting under the lamppost outside Holly's house are Martin Sheen's two sons, Charlie Sheen and Emilio Estevez.
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Trivia: Oliver Reed almost died when he was stabbed in the throat during filming of a swordfight scene.