Folks, one key to staying safe is signals, and picking these up early.
Interesting story. One question on my mind: What happened to the two people that were standing around during and after the robbery?
I guess what I'm asking is whether they could possibly have been look-outs for the car.
There's not much you can do in this kind of situation. Three feet is not hand-to-hand range if you're the one unarmed. It IS however point blank for a weapon draw. If you're going to throw down, make sure you get off the X quickly. Practice practice practice.
Practice getting that gun out and into a retention-fire position at just above waist level. Practice getting the gun out and moving to the side at the same time. Above all, practice live fire with those. Getting the gun out and slugs on target quickly is a hard thing to do without lots of practice. Hesitation after the decision point to draw means losing the initiative, which can be fatal.
There is also the option you took, which is to give up something of little relative value to spare one or two lives. Some criminals only want the cash. Others will shoot you after, which is becoming more common-place. Braver ones will let you go, then use your ID to find your home and victimize you again.
The concern here is that you never know which you're dealing with until they're gone or you're dead. I've never been in that kind of situation, and hope I never am. But I know I can't trust a criminal with my life, and that's why I carry.
I did have an "[Uh Oh]" situation the other night in a McDonald's drive thru. Long wait in line and the passenger of the car in front of me gets out (in the drive-thru??) and approaches my driver's side. As she rounded the corner of my side, I had my hand on my gun, wondering what the heck this was going to be. It genuinely got my hackles up as a "danger" moment. She ended up going inside to the restroom, I guess, but it was a moment that certainly had me thanking myself for being armed and alert.
BTW, always read what SM says. Sometimes it can be a bit of a riddle to decypher where it's going, but that guy has incredible insight on darn near everything.