Say what you want about Tom Cruise: he’s a crazed scientologist, he has no sense of humor, he’s washed up, he’s in the closet. Whatever, the guy is still an absolute baller at action scenes. Need proof? Watch Mission Impossible: Ghost Protocol.
Directors love talking about how Cruise is hell bent on doing as many action scenes as possible without using a stunt double. You may doubt this, hell, you may still think Cruise used a crapload of stunt doubles in Mission Impossible. But I ask you this: would you hang off the side of the tallest building and the world? Or run around on the side? Or do magical little flips and jumps? Probably not. [Roger Ebert's Journal]