Strange that you should mention 'natural fighters', many years ago I knew a feared street fighter, I say a feared fighter but in a neutral environment he was one the nicest, calmest men I have ever met. He had a natural boxers movement in his upper body, an ability to feint and awareness of personal space. I followed him into a nightclub one evening, laughing a joking and on the other side of the door two bouncers were waiting for him.....they didn't have a chance, I was absolutely mesmerised by his movements....happy days..