My best guess is JFK has just been struck, and Jackie is beginning to react, ~Z-209.
Connally is also beginning to react---to the sound of a gunshot, and a sense it may have struck nearby.
After this, JBC does a 180-degree turn in his seat to try to see JFK---not really possible after being shot through the chest, no?
JBC describes himself as being immediately incapacitated by the bullet that struck him. That's believable.
JBC describes himself as being pushed forward by the shot that struck him---that happens ~Z-295.
That's my read of the Z-film.
Some people have been known to do "strange" things after they've been shot in the back.
John Connally was a large man.
No vital organs were hit.
He said it felt as though he'd been hit with a fist.
BFD.
(Pardon my German)
Having already exhibited a startle reaction to Oswald's first, missing-everything shot which had occurred two seconds earlier, Connally started turning to his right around Z-163 to catch a glimpse of JFK over his right shoulder, but by Z-168 JFK had turned
his head to
his far right and had raised his right forearm to wave to the folks who were waving at and/or calling out, "Hi, Mr. President!," to him, and JBC couldn't "see" his face. So, he started turning to his left to try to catch a glimpse of JFK over his left shoulder, but was nailed by CE-399 we he was only halfway there.
In other words, you're off on Connally's "turn to his right to see if JFK was okay" by about three seconds.
Regardless, why can't you accept the fact that a psychologically disturbed, self-described former Marine sharpshooter and U-2 radar operator killed JFK to Advance The Dialectic and / or because he wasn't getting any from (probable KGB* agent) Marina by firing three shots at him over 10.2 seconds in the echo chamber known as Dealey Plaza?
Is it because you have a deep psychological need to believe that some evil, evil Southern Oilmen or the evil, evil Military Industrial Intelligence-Community Complex or an evil, evil "Deep State" did it?
You do realize, don't you, that that's what the KGB* has been trying (with great success!) to get us to believe for sixty-two years, now, through the likes of "useful idiots" (or worse) Joachim Joesten, Thomas G. Buchanan, Richard Popkin, Mark Lane, Tink Thompson, Jim Garrison, Oliver Stone, Roger Stone, Jefferson "Yuri Nosenko Was a True Defector!!!" Morley, Bill Simpich, Jimmy "I Never Met a Communist I Didn't Cherish" DiEugenio, and Tucker "The You Know-What" Carlson, et al. ad nauseam?
*Today's SVR and FSB
PS Thanks in advance for your collegial comments.
LOL!