The weapons designed by arms manufacturer Tony Stark (Robert Downey, Jr.) are no sleeker, and his bombs no smarter, than the narrative lines of this marvelous Marvel Comics movie. A tin man who realizes that, if he is to become human, he must build himself a heart and then a big red metallic airborne suit for buzzing unsuspecting planes and vanquishing his enemies. What a kick it is to see the thing fly. Same with the movie, for, like Tony, Iron Man is the perfect expression of Hollywood's engineering ingenuity. In an excellent year for action films (Wanted, Hellboy II, The Dark Knight and, as you'll soon see, Speed Racer), this was the coolest movie machine.