It quite literally lasted a half second. These two guys were argueing by the pool tables, and then all of a sudden POW!. It was a one hit knockout. The poor slob that hit the floor never saw it comming. Neither was drunk. I saw the one have a half a beer, and the other walked in the door and went right over by him. It looked like a prexisting conflict that just erupted as soon as the two saw each other.
I don't know what they were arguing about, but the hitter never gave any sort of indication he would escalate it to the point of physical violence. He just popped him full force out of nowhere and knocked him out cold. He never pushed, or put his hands up or nothing. It was sudden, unpredictable violence.
Question for all, how do we as martial artists prepare for something as sudden, and unpredictable as that?