You got some typical & expected grumpy "Trapshooter" responses. Haha!
I believe my flinches are eye/brain disconnects. Eyes say "good"...brain says "nope!"
If it's a fast target no issues. Slow target with lots of time to see with mounted gun, happens sometimes.
I don't ever remember a flinch when shooting game.
Not a result of recoil. I shoot large bore rifles without any yip. Most of my 12ga target loads are 7/8oz @ 1225fps. I sometimes shoot 1oz @ 1200fps
I was surprised to see Barkley continue his swing after the glitches. Would thing he'd start over with such a delay.