Watch Sadisflix. Behold La Lucha, a "roller derby gone awry" type of sport -- but without the skates -- that calls drag queens, transvestites, mobsters and a menagerie of other characters its fans. But what is it, exactly? This fascinating documentary answers that burning question and more as it examines how this strange duck first came to be and how it grew to become a cult hit, capturing the imagination of audiences far and wide.