Brian De Palma's 'Snake Eyes' opens with a bravura, seemingly unbroken tracking shot through an Atlantic City arena, where a corrupt cop (Nicolas Cage) witnesses the assassination of a politician and starts unraveling a conspiracy. De Palma's flamboyant camerawork and split-screen replays make the first act a dazzling technical showcase. The paranoid thriller cannot sustain that promise, deflating into a routine cover-up plot with a compromised ending. A stylish, frustrating film remembered mostly for its virtuoso opening.