This is after the fact. We always know what we should have done. Nobody goes to the store expecting to see a gunman. So you are surprised. Then I have to think. Twice I have met open carry at WM one I knew, the others were 3 PSAC guys buying ammo. I have seen uncased long guns being transferred to a different car. Is it a short range shot he doesnt expect as he concentrates on his target?l. The one thing sure is the other gun is out and already engaging while you assess the situation