In an interview with IMDB (via Fightful), The Rock spoke about his role in The Smashing Machine and said that it it’s the first movie that he questioned if he could do it or not. Rock plays MMA fighter Mark Kerr in the film, which opens Friday. He raised me with tough love. But that idea that Tara is a good thing, and when you’re really scared to do something, do it scared. because on the other side of that is something that’s going to be good.“