Just anecdotally for the stress discussion, IIRC at the NTI, I was told that they had one guy after his shoothouse run, turn blue from not breathing. Another was so stressed and 'into it', that they had to gently disarm him as he couldn't come down.I heard the same thing from the folks who ran the NTI - guns puked a lot more when shot under duress.
My reliable Glock 19 puked out at Given's. Bad mag? Changed mag - still screwed. Was it me? Transitioned to a pocket G26 for a total CF performance.
I'm reading
Policing the Second Amendment: Guns, Law Enforcement, and the Politics of Race
Jennifer Carlson
Standoff: Race, Policing, and a Deadly Assault That Gripped a Nation
Thompson, Jamie
They mention the common officer dream of malfunctioning guns. This is a pretty standard anxiety dream. I used and still get an academic failure dream of not getting tenure, losing my position, etc. The dream is in your major life paradigm and how that fails.
They mention that so many officers had the dream of guns not working, esp. after the rampages like in Florida or Dallas.