Quote from Eight:
Combat shooting is like driving a car. Drivers can rehearse things like a ball bounces out between two parked cars == hit the brakes instantly because a kid might be right behind it. It works great, visualization programs the mind to be as quick as a reflex. So the shooter is sitting at the back of the cafe and has visualized what it might be like if violent people came through the front door. He knows how far he can move how fast and how much time he will have to do same if the perps aren't looking his direction and he knows that if only ONE of them looks his direction he can shoot THAT one from anywhere in the room, etc.. He knows that EVERYBODY is moving and the only difference between him and everybody else is he has his weapon out and he's on the attack, not the retreat.. He knows that the perps won't discern what he is doing the first instant they see him and he'll be even one step closer before they even start to respond.. he knows that if somebody blinks their vision won't update what they are seeing for a full half second, etc. and so on... He knows that all of his shots are going to hit intended targets and likely most of the perps shots won't...
The fighting effectiveness between somebody that is schooled vs somebody that is not can be a thousandfold.. a hundred mercenaries have captured a force of fifteen thousand African Rebels before!