One of my colleagues told me a story which recently happened to him and it went like this: He was waiting for a cab near the Espana area when suddently two BG's approached and pulled out a knife. Somehow he managed to run a few steps ahead of the BG's who ran after him and when he gained a few feet away from the BG's, he managed to pull out his sidearm and turned at them pointing the same. The BG's upon realizing that my friend had a gun already pointed, stopped at their tracks and seconds later split up running in different directions putting a stop to the would be aggression. The question in our minds as we analyzed what have happened, rather may have happened assuming he didnt froze his trigger finger from squeezing it right away due to adrenalin rush, would it have been a legal self defense actually putting in 2 shots each as what we have programmed ourselves for matches with IPSC targets? He had estimated the BG's to have been able to stop running after him about 3 meters away from him when he was able to turn around with pistol drawn.