This story made my blood run cold...icy cold. Especially in light of the fact that a police officer murdered last night in the county just to the north. He was following a "suspicious" vehicle into the parking lot of an all night Publix grocery store. The car had barely stopped (shown by the store surveillance cameras) before a man leaped from the car already firing a handgun. At least 10 rds were fired. The man kept advancing as he fired. At least five rounds hit the officer who never had a chance to draw or call for help. The last shot that struck him was fired from a range of four feet.
The liklihood that we as civilians will face such a near ambush situation are extremely remote. The cop was doing his job by literally looking for trouble so we citizens won't stumble into a similar problem with these same wolves.
Still, according to the OP, the men ran at his friend with a gun already drawn. I'm already shaking as I contemplate my possible actions.
I submit that any time a stranger rushes at you in a darkened parking lot where there are other potential sources of "help" (should he claim to be seeking help instead of having evil intentions if he makes it to trial) can and should automatically be treated as hostile. In this case, I'm thinking proximity is my friend. The critical issue is whether I'm fully out of the car or still transitioning when a firearm is presented. If the BG is close enough to touch and I'm still in transition with part of my lower body still in the car, maybe I grab my chest and fake a heart attack. It's kinda obvious from the grey in my goatee that I'm no spring chicken. As I hit the ground I begin to "convulse" and roll so that I can safely draw. My only hope is that I'm in the dark and there is even darker shadow next to the car. Maybe they'll take off with the realization that if I have a heart attack while they're robbing me and they get caught and I die...it's felony murder for them both. But say they're not so streetwise.
As I said, in my way of thinking (comes from Aikido) proximity favors my situation. So I drop to the ground and they move to follow so they can lift my wallet, steal my keys and be gone. As they close I'm in the process of the draw. If they're close enough to lift my wallet and keys they're close enough for me to grab by the clothing...maybe to gasp MY HEART...HELP....ME.....as I shove my gun into his gut and pull the trigger several times. The muzzle blast alone is enough to avulse flesh (rip it open). Then I shove the closest hit target to the side and engage the next...putting one or more into his buddy. The big danger from shooting at literal contact is that flesh might foul the action and cause a jam.
Everything I am...all my training has ingrained in me the necessity of acting when confronted. I don't freeze. I don't hesitate. I've already made the crucial decisions of morality and law. It might be shown later that I could have made better decisions, but I'll stand or fall on my actions of the moment. That's just me. As was Patton's philosophy: A good plan executed with extreme violence right now is better than a perfect plan tomorrow. I'm at peace with that.