The first thing I did after coming home from watching Ninja Assassin was to YouTube Rain's training regime for this particular film. The guy looks unbelievably lean and ripped in this movie. What's pretty amazing to me is that his workouts looked pretty much like classic Turbulence Training.
My favourite move is the Pushup-Renegade Row-Shoulder Press thingy that he did. That's a total body workout all in itself in my opinion.
Hmm... I wonder what's the weight of the kettlebell he used for the kettlebell swings that he did. It sure looked pretty heavy to me.