im still waiting for someone to say they have done it or even seen it done in real life.
people waving guns around are prone to pull the trigger t, when they didn't mean to, I don't doubt that any sudden movement will have them fire, the only question is in the 3/10s of a,second it takes them to pull the trigger, have you got the gun pointing somewhere else and of course id it now pointed at someone else?
Hmmm really? I have responded to a lot of shootings in my day and in almost 20 years the only times there was an "oh crap" was when the person shot themselves.
Also you note the time to pull the trigger. Good, I was actually hoping you would. The average reaction time of a person, under ideal circumstances (they are ready to react, perfect lighting etc) is ~.25 seconds. This is to perform a rather linear task as well, say just pulling the trigger.
So here we have a scenario where the following factors typically exist in a street encounter BEFORE you do anything.
1. The bad guy doesn't want to kill you. They want your money, keys, cellphone, not a murder rap.
2. They are expecting compliance born of fear, after all they have a gun to your head.
3. They are tunnel visioned on the gun and what it is pointing at, in this case your head.
The first two are going to slow his reaction time even further. The third is something the technique exploits.
I could go into detail on the technique but the thing is you have a person who is likely to have a slower than .25 second reaction time. Why is this important? The average untrained person can strike with a fist at a speed of 22 fps. You are reaching for a gun AND zoning, the gun is approximately 1/10th that 22 ft, if not even closer. Ergo you will get your hand on that gun and their arm before they START the trigger pull. So long as your grip is solid AND you zone, even if they do pull the trigger you aren't in front of the barrel anymore and they can't track you to fire another shot. Then you proceed with the rest of the movement.
It takes training but does work