JBC said he turned to look at JFK.  He doesn’t even try to look at JFK before z230.  So your conclusion that this turn occurred before z230 is not based on evidence.\

What do you know about making conclusions. I've never seen you make on that made sense.

Rosemary turns back at z202-206.  That suggests the first shot just before then, just as her sister, father, Croft and Betzner, the 25 witnesses who reported seeing JFK react to the first shot said.  That’s the evidence that the correct interpretation of the zfilm should fit.

It only suggests that to people who are bad at figuring. That was about 3 seconds after the first shot was fired. She reacted about the same time JBC did at Z164 when she began shortening her strides in order to come to a stop.

Hill heard the first shot.
He also heard the second shot.
He doesn't remember hearing the third shot as he had a lot on his plate at that moment, including stopping Jackie from jumping off the back of the limo.

By the time Jackie climbed out on the trunk, the shooting was over. That couldn't have been the reason Hill didn't hear one of the shots.

I've been waiting to see if any of the LNs had a theory as to why Clint Hill specifically, but also other passengers in both limos, didn't seem to have either heard or recognized the first shot for what it was. I have speculated the roar of the accelerating motorcycles could have disguised the sound of that first shot but I wondered if others had different theories for that.

Clint Hill was drinking the night before and so were others.

https://www.newsweek.com/drunken-truth-about-jfk-assassination-391613

There are some far out CTs that I wonder if they’re serious or just having fun dreaming up outer limits type scenarios.
Then there are Tom and Andrew with the LN alternatives.
I’m ok with Andrew but Tom the KGB specialist/ Russia / Russia/ Russia LN is a big question mark. I’m not sure if he’s serious  or not. ( he seems to have TDS on occasion, but it’s ok, we understand 
John Corbett is the diehard LN.
Michael Griffith is the die hard CT.

Bill Brown and John Mytton are LNs I’ve been familiar with as far back as when Zeon Wasinsky bugged them all the time with questions about anomalies like the gray vs blue jacket problem. I took Wasinskys place a while back because he could not remember his  password. I generally follow his methodology based on a Socratic dialogue.

I voted that some LNs may have been planted because  John Mytton and Bill Brown are WC experts so a few extra less expert LNs make the JFKA forum more inviting to less expert CTs and average Skeptics like myself.

Dan:

It is understood amongst credible researchers that Lovelady & Shelley were gotten to lie and push back their departure time from the front steps to 3 minutes after the shots in order to make Victoria Adams look silly and to destroy her witnessing of Oswald not being on the Northwest steps when the official story needed him to be...There's some basic rules of evidence you are violating here...We can see Lovelady & Shelley fast-walking up the extension in Couch/Darnell so therefore visual film evidence trumps testimony and shows that Lovelady & Shelley left the steps around 20 seconds after the shots when they were inspired by Calvery to go up to the Knoll and see for themselves...You are violating the rules of evidence as well as rational thought because we can see Lovelady & Shelley going up the extension in Couch/Darnell and it tells us what the true version is...

The version Bart Kamp used was the Sprague copy...Obviously Sprague used the best enhancement technology of his day which was probably limited to brightness and zoom...One thing is clear though, Sprague used the original celluloid films as his source, as is evidenced by the fact Kamp was able to get the best detail in his enhancements...That best source that Kamp accessed was able to produce the visible details seen on Lovelady & Shelley as well as Lovelady's bald spot...Lovelady's plaid pattern is a geometric match and matches his plaid shirt pattern precisely...That is a dead-lock that makes the sincerity of what you offer suspect...No serious researcher would doubt the men being Lovelady & Shelley at that point...

This was all in the hands of Larry Schnapf who could have gotten the 1st generation 6th Floor Museum copy of Darnell simply by asking...Schnapf went on the Education Forum and explained why he wasn't going to request the 6th Floor Museum 1st generation copy...The words Schnapf spoke to describe his reasoning were words that came directly from the Prayer Man gang and their shameless suborning of perjury before Congress...Because the Task Force was not able to obtain the original Wiegman and Darnell films the 6th Floor Museum copy then became the best available copy of Darnell...This was proven by the fact you can see Sarah Stanton's dress neckline on Prayer Man in that copy...So no credible researcher would ever make a case for not obtaining the best copy...Obtaining the best copy is an unspoken thing amongst credible researchers...It is only the Prayer Man-hijacked JFK internet that would make a case for NOT obtaining that copy...And the way they achieve that is by banning, ostracize-ing, and censoring those researchers who question it...The Education Forum is a fraudulent website, as are its administrators...The effort to NOT obtain the 6th Floor Museum copy is a disingenuous one whose sole purpose is to avoid producing evidence that Jim DiEugenio is a fool who promotes already-disproven theories before Congress...Iler is a greasy fixer who makes grandiose rules designed to bail out his partner DiEugenio and avoid the correct evidence...It is this copy that will better show Lovelady, Shelley, and Molina...

The mark is already set and we await the obtaining and scanning of the 6th Floor Museum copy of Darnell...

                                                                           "It is Understood..............".

                NOTHING is cavalierly "understood" here. Proffer your EVIDENCE and this Forum will let you know where you stand. Right now, you're circling the drain.