A guess implies the absence of a memory. But people recalling a distinct tempo of the shots were not guessing. Here is Harold Norman relating the tempo of the shots (at the 0:24 sec mark)
His recreation is 5 seconds. If it had been 10 seconds, it would be noticeably slower. You don’t think Norman would have known the difference?
Norman also recalled that when he heard the 1st shot it was when JFKs right hand was up to his head
As though he was brushing his Hair. That’s remarkably coincidental with JFK at the Z190 frame.
The reason I have not dismissed a Z190 1st shot is because it seems about how long it would take for the shooter to have leaned over , position the rifle on the boxes, adjust rifle to align his scope reticle and start adjusting as for the moving JFK. If the shooter had arranged those boxes to use as a rifle rest , then he most likely had envisioned the 1st vertical angle that he would attempt the 1st shot just as he envisioned the horizontal plane angle by how he positioned the boxes at the angle they were relative to the window ledge.
The Z190 1st shot fits well enough with the 1….2..3 pattern and it’s closer to Norman’s 5 sec sequence.
As far as the tree foliage , it could be that the shooter was able to have positioned his rifle as early as Z140-Z170 but he took longer than he had anticipated for tracking JFK in using the scope sight picture. Because of that more narrowly focused area , the shooters peripheral vision was lessened such that perhaps tree foliage appeared in his sight picture suddenly just AS he squeezed the trigger.
There is still the Tague problem however. It doesn’t seem to be plausible that a Z313 fragment could fly over the windshield and drop down if it had enough velocity to haves chipped the curb. Maybe a lead fragment traveling at 200 ft/ sec can chip off a small particle of concrete from the curb? IDK.
