??When you say: "So JFK decided to make this extreme and rapid reaction reaching for his throat and by some outrageous coincidence just happened to be shot through the neck milliseconds before he made it." you are saying that it is ridiculous to suggest that he had this reaction milliseconds after being shot in the neck but that there is no connection between being shot. I agree. That would be ridiculous to suggest. That is one reason I have never suggested it. His reaction is obviously a reaction to being shot. A word of advice: if you are going to set up a stawman argument, don't make it a circular.
Wow
In a previous post you made this absolutely ridiculous point:
"But that does not mean that every sudden response is a reflex. If I suddenly jerk my lower leg it may look like a reflex. But if it is not done within a few milliseconds after the stimulus (e.g. by the doctor hitting my knee) it is not a reflex reaction." In your desperation to try and come up with some kind of counter-argument, no matter how bizarre or weak, you made the above ludicrous statement and I was making fun of it.
The question is how long before this was he shot? Nothing you have shown or argued excludes the possibility the he may have been reacting for all or some part of the second or more before when he was obscured by the sign after being shot around z200 or slightly before, which is where the evidence indicates the first shot occurred.
There is no extreme reaction of any kind present in the Z-film before z225.
There is after z225
In your desperation you want to hide behind the Stemmons sign and play "What if"
The fact remains, regardless of some potential, maybe reaction you might want to cling on to - the time gap between your proposed shot at z195 and the radical and rapid reactions recorded in the Z-film at z225, is over one and a half seconds.
To have some mild kind of reaction for this time then suddenly to burst into the intensely rapid physical reactions we see in the Z-film is preposterous and it's on you to show anything from anywhere that is remotely like that.
Good luck
And why would JBC not move the hat he was holding in order to turn around to see JFK?