First Last and Always.
Situational Awareness
Especially at places like the DMV when renewing your drivers license and the sign on the door says “No Firearms Allow”. Scary Place.
Sit in the back, constantly turning your head while in the long long line, never let anyone too close, just keep moving around, stand sideways at the counter to avoid giving them access to your blind side, Etc.
Exactly what I was thinking. Also, I would KNOW my gun fell off, my mind would be on it during such a fight as I would be trying to reach for it. That's another thing I don't understand about this incident. How does the guy end up that far away from where he was attacked?