This is part of Mary Woodward's initial recollection of the shooting:
"We had been waiting about half an hour when the first motorcycle escorts came by, followed shortly by the President’s car. The President was looking straight ahead and we were afraid we would not get to see his face. But we started clapping and cheering and both he and Mrs. Kennedy turned, and smiled and waved, directly at us… After acknowledging our cheers, he [JFK] faced forward again and suddenly there was a horrible, ear-splitting noise coming from behind us and a little to the right."
Two things to note:
1) Both JFK and Jackie turn directly towards where Woodward is standing.
2) The first shot occurs after JFK has faced forward again.
In the Towner film Jackie is looking off to her left as JFK waves, so Woodward is not referring to this wave.
In the Croft pic (@ z162) Jackie is still looking off to the left.
In the Z-film Jackie does not turn to her right until around z190 just after JFK looks to his right and starts waving. This is clearly the wave Woodward is referring to.
The first shot doesn't occur until JFK looks forward again, after z190.
This cannot be coherently disputed.