Connally: "I was knocked over, just doubled over by the force of the bullet. [...] The force of the bullet drove my body over almost double." (1 HSCA 42)
When does this happen in the Z-film?
It didn't. He fantasized it.
Or Nellie fantasized it and convinced gullible John.
His misremembering it like that is just one of the many JFKA anomalies the KGB* has "made hay" from over the past sixty-six years.
*Today's SVR and FSB
Bonus post:I've edited my previous post.
You wrote:
"I do not believe JBC did a 180-degree turn in his seat, to check on JFK after being shot through the chest."
My edited reply:
Neither do I.
In reality, the "I Gotta See If JFK's Okay" turn JBC was referring to started at Z-165 when he turned his head and upper torso far to his right (after having made a rapid and conscious head turn to his left between Z-150 and 161) in a futile attempt to catch a glimpse of JFK over his right shoulder.
I've already pointed that out to you a couple of times.
Or, do you think his starting to turn so far to his right at Z-165 was just to check out the hot chicks JFK may have been waving to?
PS
Me, "towering"?
Not really.
Having shrunk two inches over the past four decades, I'm only 6' 3", now.
Addendum:Rhetorical questions regarding Z-frame 187:
1) Why is JBC's head turned so far to his right?
Answer: To see if JFK is okay after hearing Oswald's first, missing-everything, shot at "Z-124".
2) Why is the guy (Kenny O'Donnell) riding in the passenger's-side jump seat in the Secret Service follow-up car tilting his head so far to his right?
Answer: To see if JFK is okay after hearing Oswald's first, missing-everything, shot at "Z-124".
3) Why is Rosemary Willis looking back towards the TSBD instead of JFK and Jackie in the limo?
Answer: Because she heard Oswald's first, missing-everything, shot at "Z-124" when it came from that direction.
https://assassinationresearch.com/zfilm/z187.jpg