William A Wellman - The Public Enemy (1931)

James Cagney created his career-defining role in William A. Wellman's 1931 landmark gangster movie, "The Public Enemy," also starring Jean Harlow, Mae Clarke, and Joan Blondell. The film, which was nominated for an Academy Award for "Best Screenplay," traces the rise and fall of Prohibition-era mobster Tom Powers (Cagney). From his childhood corrupted by the beer hall, pool parlor, and false friends, to his adulthood as a henchman of ruthless but innately decent bootlegger Paddy Ryan (Robert Emmett O'Connor), Tom rises to the top of the heap, with all the accoutrements of success: custom-tailored tuxedos, fancy cars, and gorgeous girls. But fate soon takes Tom down another path. His degeneration from brash kid to vicious low-life is brought home in the now-legendary scene in which he smashes a grapefruit in the face of his latest mistress (Mae Clarke).