When punk rock exploded in the U.K., young British director Alex Cox was trapped in California. Furious at having missed out on punk's crucial moment in his homeland, Cox did the next best thing: He made Repo Man. One giant nihilism-smothered sickly grin, the film depicts an otherworldly Los Angeles subculture in the time of Reagan and nuclear fear. Tan and snotty Emilio Estevez plays Otto, who, fired from his job and dumped by his girl, wanders the streets until he's recruited into the life of…