TG-
Maybe

shake the hand that shook the hand o’ tar baby, brer ! hey bigdawg, you need to stop your serious dialogue with The Brian, his tar is sticking to you !  you have fought the good fight like McAdams+ stars in your Crown, Henry !

You didn't answer the question. If JBC was to the left of JFK when the bullet exited the centerline of JFK's throat, how is it possible that bullet could have passed to the left of JBC's torso when JBC was only 3 feet in front of and to the left of JFK? The geometry for your theory is impossible.

If you want to be taken seriously you need to show why it would be impossible. Not at z223 when  you suggest the first shot occurred but between z190-z200 when the evidence indicates it occurred. (I suggest z193). I agree a shot at z223 would not miss JBC's back. 

You could do that by specifying the angle of the trajectory not at z223 but at z193, the distance between the two men and their positions.

I have done all that by creating a 3D software model based on an accurate map of Dealey Plaza, an accurate car model and location of the car at z193 and the position of the two men in the car. This is where I found the bullet to go after passing through JFK:

Also, JFK did not immediately tilt to his left following being shot. His initial reaction to being shot was to raise up and bring his arms up to the level of his chin. It was only after his elbows went back down that he started leaning to the left. By claiming that the shot that struck him initially was in the early Z190s, you are adding two more seconds to the how long it took him to make that move to his left.

You never seem to be the least bit bothered by the impossibility of the things you propose.

It looks obvious to me that at z225 JFK's right side is not pressed against the car and he is not leaning to the right as he was in z193.

Please tell us what we'd see in the Zapruder film, according to your theory, if the Stemmons Freeway sign hadn't been there on 22 November 1963.

JFK's reacting to having been hit "at Z-193," or his getting ready to react to having been hit "at Z-193"?

(LOL)

I don’t have a theory. But I can tell you what facts are established by the clear preponderance of evidence:
1. there were three shots
2. the first shot was just after z186 and before z202.
3. the first shot struck JFK
4. the second shot was perceptibly after the mid point between the first and last.
5. the third and last shot struck JFK in the head
6. the above five points means that the second shot was perceptibly after z254.

I can’t tell you for sure what JFK is doing when we can’t see him other than to relate what witnesses observed him do or appear after the first shot. But that varies according to the vantage point of the observer. The only person in the same vantage point of Zapruder was Zapruder’s camera and it doesn’t show what he is doing. But I would suggest that it is reasonable to infer that between z193 and z225 JFK brought his right hand down, moved left and assumed the startled look we see in z225.

That comment shows that you have misunderstood what I have been saying. I have never said or suggested that witnesses are always right. One has to look at what it is that they are observing what whether there are common factors that would cause them to make the same mistake. In the case of observing the direction of the sound there are many reasons why witnesses in the same general location would be mistaken in the same way.  But with respect to easily observable visual recollections in full daylight there are no common factors that would likely induce the same mistake in a high proportion of witnesses. One also has to examine all the evidence.  In this case there are multiple independent facts established by witness observations that fit with each other and corroborate each other.

I expect the above paragraph will also be misunderstood. I can only hope that maybe you will try to apply a bit of rigor to your dismissal of it that at least shows you have read it.
I agree that JFK was sitting so that his midline was a bit to the right of JBC before he was shot through the neck. We just disagree with how much and how much would have been required for the right to left shot go on to strike JBC’s right armpit.

My point was that he has moved quite a bit to the left by z225 and z226 because he essentially stays in that left-right position through to at least z270 if not z313.  So if he moved left after the shot that hit him he must have moved before z225. If, as you suggest, he was hit at z223, that leaves 2 frames to move left.

You didn't answer the question. If JBC was to the left of JFK when the bullet exited the centerline of JFK's throat, how is it possible that bullet could have passed to the left of JBC's torso when JBC was only 3 feet in front of and to the left of JFK? The geometry for your theory is impossible.

Also, JFK did not immediately tilt to his left following being shot. His initial reaction to being shot was to raise up and bring his arms up to the level of his chin. It was only after his elbows went back down that he started leaning to the left. By claiming that the shot that struck him initially was in the early Z190s, you are adding two more seconds to the how long it took him to make that move to his left.

You never seem to be the least bit bothered by the impossibility of the things you propose.