Yes always the dependable knee jerk "you are on your own" "it is all up to you" "no one is coming to help" "good guy with a gun" NRA fueled fantasy world crapola.
How many times do we have to see where the good guys with guns never draw them as was the case at the Oregon JC a year or so ago. Or do draw them and come withing a 1/10 of a trigger finger squeeze of shooting an "innocent bystander" as was the case with Gabby Giffords "town hall" in that shoping center parking lot. ??
Here is the scenario that is possible if not likely that comes out of the "good guy with a gun" scenario the NRA will never touch.
You are in LE and out on patrol on a bright and sunny Saturday morning and you hear the call over the radio "shots fired" in oh lets say the local Safeway parking lot, it is 3 minutes away you hear no other report and get no description and within a minute can hear the shots, you roll up and get out head for the sounds of the shots and within 10 seconds see a guy, god forbid it be a black guy with a gun, lets add the degree of difficulty of saying you are some kind of detective, not in uniform and in an unmarked vehicle, The guy turns, has his gun drawn but is no where near pointing it at you or anyone else or maybe just maybe he is in fact pointing it in the general direction of at least one person , the person he is mistaking for the shooter, or maybe he in fact points it at you because all he sees is "a guy with a gun". You shoot him and as per popular training it is center of mass and just keep shooting until he is "neutralized" AKA DEAD.
You find out that person was that "good guy with a gun"
In the "confusion" the shooter, the actual shooter shoots 3 more people until his last maybe only 30 round glock mag is empty, drops the gun he bought at a gun show "no questions asked" which is where he got the mags and ammo as well and fades into the crowd.
He was wearing gloves, the gun has no prints or DNA on it.