You are defending you! Stay in the damn parking lot, be a good witness and defend your own life if you have to. A jackass with a drawn gun is not the time for bravado.
Being a good witness...you should be able to tell dress, height , car, plate, ethnicitity, number of BG's and direction of travel.
You should not go in the damn store and become part of the problem. You should not engage the BG's unless they engage you.
Your place is outside...remember you have not gone in yet. You know what is going on only because you don't have your head up your butt.
Calling 911 is your #1 priority
I hear what you're saying, Festus, and I agree it's probably the way to go. However, as I think on this more... that cute little blond co-ed is someone's daughter and I'm not sure I could just stand by and wait to see if she gets her face blown off. Don't misunderstand, I'm NOT a hero and I'm NOT looking for kudos. I'm just not sure if I could live with myself if I had a chance to save her and I didn't take it. I would kiss the feet of someone who saved my kid's life...
Just me.