When Tony Stark is kidnapped and forced into a cave in the beginning of the first Iron Man film, we as an audience are so wrapped up in what is going on that we focus quite solely on Tony. When Tony finally puts on the suit and takes to dispatching his captors we're looking so closely at what he's doing we fail to notice who exactly he punched in the face and sent flying across the cave. That person was none other than Rage Against the Machine guitarist Tom Morello, who is a friend of director Jon Favreau. Listed in the credits simply as “Guard,” Morello has the honor of being the first person that Tony Stark sucker punchers in his newly invented Iron Man armor. Morello also contributed guitar parts for the film and its sequel.