For an actor who has starred almost simultaneously in three of today's biggest action blockbusters, Robert Downey Jr. is an unlikely hero, though his journey from an early run of flops and personal troubles to the Iron Man franchise has been epic. The very human RDJ goes beyond that well-chronicled ride and talks to Off Camera about lessons learned over his long career, why he's both skeptical and enamored of his art, and his ability to bring mass-market aspects to the small movies and independent spirit to the big ones. That, and tap dancing...