Very well said.I was taking a Weapon Retention course, and the instructor asked us at the start "What'll you do if someone shoots you?" One student said "Die," another said "Bleed." He said "No, you're going to get mad, fight, move. Getting shot doesn't mean you're out of the fight." He went on to talk about goal-oriented individuals, and people who have been fatally wounded but didn't die until the fight was over. You're in the fight until you're dead, unconcious or paralyzed (i.e. the Miami FBI shootout).
I'm not knocking this agent, I wasn't there, I don't know what he saw, where he was shot, and how that affected his central nervous system. I've never been shot, and every shooting I've been involved with has been as person walking up on it or as a person getting involved the second it took place, but my goal is to finish any fight I get involved with, whether I want to be in it or not.
Finish what was started. Stay in the fight. Save the "what-ifs" for later. Aim and fire. Repeat as necessary.