That is, when faced with an attacker who intends to do you serious bodily harm, are the only techniques that work in such a self defense emergency those that kill, maim or knock out your attacker? When an attacker is "keyed up" with adrenaline flowing through his body very fast do pain compliance techniques fail? In the case of someone who has suffered a lot of personal pain all his life through being abused all his life essentially immuned to a defense that merely causes pain? And in the case of somebody who is on serious drugs is that especially true? That is the contention of a former self defense teacher of mine who is well regarded in the field. His resume is very impressive. In general, I've tended to go along with his arguements, as distasteful as I find them, as he seemed to know what he was doing, and his decades long teaching of law enforcement personnel seemed to indicate somebody who knew what he was talking about. Still, it is only one opinion, and in every field there are experts with differing opinions, differing interpretations. My personal experience with serious self defense is very limited. I was attacked by somebody on serious drugs once and found solid kicks to the testicles didn't slow him down at all, he acted like he hadn't even been kicked. Of course a kick in the knee that broke his leg would have certainly worked, no matter if he felt any pain or not. So the question, primarily to those who have been atttacked in a very serious way in a very serious self defense situation is whether or not there are alternative ways to defend yourself without killing, maiming or knocking out your attacker?