Mryana, very valid points. Like I said, I am sure a myriad of questions and answers will be in one's mind in such situations.My concern would be that I might not be fully aware of what I was seeing. Did I see a bad guy threatening a group of innocents who need me to intervene? Or am I watching a good guy defending himself against the mob of bad guys, and at risk of shooting the wrong person? Another scenario is that I'm watching two groups of bad guys fighting it out. All questions the police deal with every day. I remember hearing of an Air Force member firing in the air to help someone in Baltimore, over a decade ago. A police officer arrived on scene and had to make a quick judgement; the officer shot the Air Force member he saw firing a gun.
----- Not directed at you, mryana, but for general info since Branca was mentioned previously.