The only thing I can add to this topic is my own experiences. As a Soldier and Correctional Officer, when faced with life and death situations (fire fights, an inmate with a shank hell bent on killing you), everything seems to just STOP. For me, I'm not thinking of what technique to use. I'm not standing there racking my brain. It's almost like you blank out at the time of engagement. My mind is totally clear, I'm just not thinking of anything. After things have settled down, I always ask what did I do? An outsider not involved tends to have a clearer picture than the person in the "storm". To me, my experiences would define combat. Kinda hard to explain.