Midnight Cowboy (1969). While filming a street scene without any crowd control, Dustin Hoffman almost got hit by a taxi. He yelled "I'm walkin' here!" in a thick NY accent and started beefing with the driver. Then he casually ad-libbed, "Actually, you could even squeeze some cash out of a guy like that," which fit his character Ratso—a native NY hustler—perfectly. It has since been homaged in countless movies and shows.