Many of you Lost fans automatically got a first peek at this trailer on Thursday night when it aired during "The Constant." For everyone else, here you go: Robert Downey Jr. and his devil-may-care attitude plays Tony Stark, a weapons designer who creates a crazy metal suit when he's taken hostage in Afghanistan. He uses the suit to help him break free and return to the U.S. where he leads a double life as Iron Man, the self-made superhero. Iron Man opens May 2. To check out the trailer, complete with some driving classic rock, read more.