Good piece. Other than the Army I’ve never been in a gunfight. But, as a pilot I’ve enough inflight emergencies that I think doing the right thing requires a certain ability to remain rational and observant while everything else around you seems in chaos, all while trying to organize the chaos.
The Kubler-Ross stages of grief are useful constructs: denial, anger, bargaining, depression and acceptance. You will be in Denial when presented with a life threatening crisis; you just can’t stay there for more than a second. Anger; yep. Bad guys on three sides; next. Bargaining: can’t be happening to me, I’m a decent person, pay taxes, love my kids. Nope, it’s happening. Depression; skip this one, it’s just a waste of time.
Finally you Accept the disaster, hopefully transiting the above in the blink of an eye. They trap people in crisis all the time. Not you though.
The training should kick in; should START to kick in during the denial phase when you see the situation is real.
I’ve had several inflight engine stoppages, and two forced landings. Two were unsolvable from the flight deck; on one we were very low and the copilot did the work of trying to restart. On the other it was just me, again at fairly low altitude and I went back to training/procedures/recited checklists out loud and it worked out OK; real bumpy though.
Training works; thinking while reacting per training works. You should be well enough trained that you do not have to think about whether the piece is loaded, cocked/locked, trigger finger position, front sight focus.