I thought I had clarified where the spinal reflexes fit into our training but I guess I'll have to try harder.
Hitting the guy and seeing the reflex you expected to see is a great thing to have had happen in a violent encounter as noted above it's a great feedback mechanism which allows me to gauge my progress in what I'm doing to the man, and it can help me tactically but thats all it is, I don't wait to see it or base my next move on it,I'm tearing into the man until he stops moving so if I hit him once I don't stand there and say wow that was a nice groin reaction, no I'm already looking for my next injury and if on my way there the guy doubles over and goes fetal and my punch to the back of the neck I was going for hits nothing but air I'm ok with that because now he's on the ground and I'm about to keep working him over On the flip side of that if I hit him in the groin and nothing happened it still had no effect on my flow because I'm still looking for my next injury and then the next one until he is no longer functional.
Effects of fear and adrenaline: Some of the effects you can experience during a fear induced adrenaline response are Visual Clarity, Slow motion in time, Temporary paralysis, Sense of pain shuts down so that tissue wounds do not hurt, Rapid Coagulation of the blood and some others that are not pertinent to this discussion which is why you see prison footage of a guy with slashes and cuts all over his body that would make everyone watching loose thier appetite and still go on to kill his attackers and officers being shot in the eye and chest with the bullet nicking thier heart and still going on to persuse and kill thier attackers. So the body can do some amazing things when it's trying to survive but non of those effects I listed above gives you the power of invulnerability.
When I punch him with a knife in his liver or heart repeatedly like in the vid above its to put enough holes in it that he bleeds out way faster than his body can stop the bleeding now while he may not even know he's being stabbed, he may think I'm punching him and he may not even feel pain, that has nothing to do with the fact that the body needs to have a specific amount of blood in it for normal functioning and when I open up his liver,and aorta he's going to be pumping loads of blood out of his system with every heart beat which is much different from being cut and slashed across the face, chest and back, But if I stop after one stab I'll be the one on the ground. When I crush the nerves on the inside of his legs he may not feel pain but then again I'm not interested in causing him pain when I slam into the inside of his legs, I'm concerned with taking out the motor nerves that gives him the ability to control his legs so now I'm fighting a man with one leg and creating new nerve paths is not an effect of adrenaline, so when he goes to take a step he wont have a leg to stand on.When I tear his eye out of his skull he may not feel pain but he can't see anymore and seeing through an eye that is not there is not an effect of adrenaline, when I rupture his ear drum he may not feel pain but a ruptured ear drum comes with some other symptoms other than pain, like loss of balance,vertigo and all the other effects that go along with vertigo so that just makes my job easier in putting him down thats what every injury gets me, one stop closer to making him non functional.So you'll notice in non of my posts above I spoke about or even used the word pain because while pain may be a symptom of injury,injury is something much different and far worst and with injury you ALWAYS get a decrement in the body's normal functioning.
notice how when it happened there was no pain or even a spinal reflex but also noticed how non of that made of difference