The Bourne Identity was, above all things, muscular – lean, taut and physical – and its sequel, The Bourne Supremacy, has not let the series get flabby. There is a new director, Paul Greengrass (Bloody Sunday), but he and returning star Matt Damon maintain the skid-marked style of original helmer Doug Liman. Like its predecessor, this is an action movie in which the punches make you flinch and the car chases just might give you whiplash.