Looks like he needs a new body. Oh, and "break a leg" as I heard it explained was actually more advice than wishing good luck. The idea is you're telling them to give it their all, even if that goes to the point of breaking a leg. Alternatively you can mean it quite literally as a good luck wish to an MMA fighter. After all, if he breaks a leg there, it's a good thing. Long as it's not one of his anyway.