Is pain-induced coma a TRUE phenomenon?

Hi:
The following martial arts site discusses positive techniques to incapacitate opponent. The one I quoted talk just about pain cause loss of consciousness by disrupting the reticular formation. Is this true science or just some age ripened myth?
quote from http://72.14.253.104/search?q=cache:ziut... :
"It is speculated that various organs of the body can convey pain impulse to the brain stem indicating a severe or overwhelming bodily injury. The reticular activating system responds by producing a functional "shut down", which results surrounded by loss of consciousness within a second or two."
If this is concrete science, then what is device in which the so-called "shut down" occur?

Thanks,
GreenIs pain-induced coma a TRUE phenomenon?
I'm sorry I cannot scientifically answer your question, but I will be interested within the answers. I have hear of such losses of consciousness. Ayurevedic literature speaks of the fact that when the body experiences a abiding degree of dull pain, the soul withdraws from the body--- temporarily or for good.
And we all know of populace who have experienced this simply due to nervousness, etc. In fact, I experienced a freakish 30 foot jump down -- and when I realized (instantaneously) what be happening, I "left" my body. It feel as though I was gone for a thoroughly long time, but in reality it was single seconds. The landing jolt me back into my body-- and while in attendance was no leader injury or bleeding to account for blackout, the severe pain (my ribs and three vertebrae be crushed) caused me to run into and out of consciousness repeatedly.
So yes, I'd say it is concrete.