I am not sure what you are looking at. The HSCA photographic panel concluded that JFK was reacting to a servere external stimulus before disappearing behind the Stemmons sign. I see a marked change between z193 when he is waving and smiling and z198 when he drops his right hand and turns his head forward:

You will also note that at this time they have just passed Mary Woodward:"After acknowledging our cheers, he faced forward again and suddenly there was a horrible, ear-shattering noise coming from behind us and a little to the right. " As we know, a bullet precedes the sound of the muzzle blast. At 200 feet the time difference is almost 2 frames.
“I am not sure what you are looking at. The HSCA photographic panel concluded that JFK was reacting to a servere external stimulus before disappearing behind the Stemmons sign. I see a marked change between z193 when he is waving and smiling and z198 when he drops his right hand and turns his head forward:” I am sure you do, but that has no value with the Willis Photo and Mary Woodward’s statement contradicting you.
You will also note that at this time they have just passed Mary Woodward:"After acknowledging our cheers, he faced forward again and suddenly there was a horrible, ear-shattering noise coming from behind us and a little to the right. " As we know, a bullet precedes the sound of the muzzle blast. At 200 feet the time difference is almost 2 frames. How does that equate to Z193.
She stated JFK was hit after he turned forward which does not occur until after Z207.
JFK disappears behind the sign at Z210 while still waving
JFK is still waving in the Willis photo thought to be Z210 and so is JBC. True campaigners tn your story to ignore having been shot and keep motoring on.
What you fail to post is all of Woodward’s 11/22 statement. Even though she does not think the first shot hit JFK, Mary has JFK reacted to the first shot, and the second shot was the headshot followed by another shot. So much for JBC hit by a separate shot, let alone two shots.
M Woodward
“.I don't believe anyone was hit with the first bullet.[b] The President and Mrs. Kennedy turned and looked around,[/b] as if they, too, didn't believe the noise was really coming from a gun...Then after a moment's pause,
there was another shot and I saw the President start slumping in the car. This was followed rapidly by another shot. Mrs. Kennedy stood up in the car, turned halfway around, then fell on top of her husband’s body…”