When Tom Cruise agrees to do a movie, the dude DOES the movie. As in: he brings excessive amounts of energy and talent to all things related to the production, both on camera off. Cruise even enjoys doing most of his own stunts -- something you already witnessed if you saw the trailer for 'Mission: Impossible - Ghost Protocol' and the scene where Cruise's Ethan Hunt runs down the side of the Burj Khalifi, the tallest building in the world. The couch-jumping star didn't limit his work on 'MI4' to simply death-defying heights -- he also was on hand for some driving stunts that were dangerous enough for his co-star Paula Patton to fear for her life. Sorta.