This thread has had some great thoughts by many on the subject, I would suggest the mods make sure this one does not degrade like others and stays on topic as well,
Unless this:
Is good marksmanship enough? Not if you're scared to death, or, as self-defense expert Massad Ayoob says in his training course, "almost paralyzed with fear."159
"You drew the gun because you perceived yourself to be in danger, and that means body alarm reaction or even fight or flight reflex have kicked into gear: you're stronger and faster and meaner, but you're also clumsy and jumpy as hell. A tense person who is startled or thrown off balance tends to respond with convulsive muscular movements, and this could make your gun go off. At best, this is embarrassing and can give your position away; at worst, you can shoot an innocent person accidentally.181
Fight or Flight. The survival reflex is a profound and complex physiological event designed to prepare the animal within to either fight or flee for its life:
When fear explodes inside of you, your sympathetic nervous system instantly dumps a variety of natural drugs and hormones into your body to cause a high arousal state known as fear. You are literally under the influence of these natural chemicals, so your body operates differently, just as it would under the influence of a chemical you deliberately ingested.164
These chemically induced changes take effect immediately and last for a "significant" period of time.165 They have specific implications for one's ability to effectively use a handgun for self-defense.
One common effect is distortion of perceived time, called tachypsychia.166"An event that takes milliseconds may seem like minutes as everyone and everything appears to move in slow motion."167
Other physical changes typically include pounding heart, muscle tension, trembling, dizziness, nausea, dry mouth, tingling sensations, the urge to urinate and defecate,168 and hyperventilation and fainting in some cases.169
Several of these effects specifically, directly, and dramatically degrade the handgun owner's ability to use his weapon. For example, temporary paralysis—"momentarily freezing as your body is desperately trying to catch up to the sudden awareness that your life is in danger."170
Tunnel Vision, Temporary Blindness, and Auditory Exclusion ("tunnel hearing"). Other physiological changes impact not only the ability of the handgun shooter, but the safety of innocent bystanders: tunnel vision, temporary blindness, and auditory exclusion (also known as "tunnel hearing"). According to expert Ayoob, these are a result of a primeval decision in the cortex of the brain that "there is only one thing that concerns us now, destroying or escaping the thing that is attempting to destroy us....The eyes still see and the ears still hear, but the cortex of the brain is screening out anything that is extraneous."187
Tunnel vision is a loss of peripheral vision. For example: "Your field of vision may narrow to mere inches and you may lose your depth perception and your ability to see what is behind the threat."188 Thus, tunnel vision makes the shooter concentrate so much on the perceived danger that he may not see other "bad guys" on his flanks or innocent bystanders behind or near to the person he is concentrating on.189
Other experts warn that, as part of this effect, the shooter may lose the ability to see or focus on the gun's front sight, which is obviously bad news for the owner who trained to shoot using those sights.190
Hysterical or temporary blindness, amaurosis fugax, is another serious visual effect that, according to Ayoob, "seems to happen to people who are not prepared for violence and who are not trained for it," whom he calls "lightweight amateurs." This visual "whiteout" occurs because "the mind has seen something so terrifying, it refuses to look at it any longer."191
"Tunnel hearing" is a distortion the most common manifestation of which is diminished sound, "which can range from total loss to sounds seemingly muffled and distant."192"
Impaired Thinking. One's very "ability to think in a rational, creative, and reflective manner" is likely to be reduced or perhaps eliminated under mortal threat conditions.182 This "will generally cause a massive block of the brain's ability to process thought functions."183 The inability to process thought functions rationally and reflectively will have an obvious effect on one's ability to clearly sort out whether the situation is appropriate for the use of lethal force.
At the practical level, impaired thinking is also likely to block the ability of the handgun owner to deal with such likely problems as a jammed pistol. "Most people in this situation will not be able to determine much more than the fact that the weapon is not working....Adrenaline rush will probably preclude the ability to analyze, maybe even recognize the malfunction."185 In short: "The more complex a motor skill behavior is, the more likely it is to be forgotten or bungled under extreme stress."186
has something to do with the thread title and discussion somehow, which I don't see at the moment.
Brownie