BD, you really do have problems with comprehension, don't you?
Let me 'splain it to you...
I
did not say that one should be a good witness. I said that is the "correct" answer in Iowa, based on the no longer required permit to carry courses.
I
did say "if you want a shot you have to get his gun on you."
After a retired LEO answered the scenario with Hey buddy BANG, I clarified my meaning that you have to get the BG's gun off of the clerk (not actually ON you) but I did not make that clear.
Another retired LEO stated that he agreed with the first... only more derrogatory in order to get BG's FULL attention.
Now, going to the OP's request for the physiology of the shot... one poster linked to the wikipedia article on the Medulla Oblongata... In fact he posted while I was writing my first response.
After a few posts the OP chimed in with what he meant by the "physiology of the shot"
more of the physiology of what could happen
There are concerns as to what can happen after the shot, (legal, civil and otherwise) and I referenced the Omaha Walgreens shooting...
I also said:
If I can't guarantee a MO shot... (because I cannot guarantee any shot at a moving invisible target) while he has the gun on the clerk, I can't take the shot... If I can get him to turn.... I have opportunity hopefully only putting myself at risk. But I'd hope to end it before any lead came my way...
(red added for this post.)
I CANNOT GUARANTEE AN MO SHOT, never said I could... If I could, I would shoot him with his gun on the clerk... since I cannot, I choose to attempt to draw his attention to me.. and fire before he is "on me" and after he is off the clerk.
While you, on the other hand, have said no where in this thread what you would do... you would probably just yap yap yap and tell whoever did anything that they were wrong.... But go ahead and knock yourself out until your fingers are bloody stumps...
And as to another poster, your comments are not backed up by some "real deal guys" here who are retired, who have met and
dealt with more Bubbas than you have met in your life.