Even when presented with filmed evidence, you can't admit the truth. People don't suddenly and rapidly turn their heads for no reason. That is not natural. They make rapid head movements in response to external stimuli.
It's
you who can't admit the truth. You skirt over the testimony of agents Landis, Ready and Hickey as to their immediate response as recorded in Altgens6 and confirmed by agent Youngblood's testimony to seeing abnormal movements in the Presidential follow up car after the first 'explosive' noise. Instead you think they just reacted slowly. We see the agents not reacting up to z207,
over three seconds after a supposed shot at z145. Three seconds to react to the sound of gunfire?
It is the lack of reaction by these SS agents in Zapruder that refutes the idea of a shot at z145, not to mention the copious 'ear-witness' testimonies describing the first shot as being the one to which JFK reacted by throwing his hands up to his throat.
Even if we, for the sake of argument, throw out the Z154-167 reactions, that still leaves four other clear sets of gunfire reactions:
2. Z186-207
3. Z226-232/Z233-240 (to be extra cautious, I'm combining these two into one)
5. Z290-305
6. Z313-320
Are you actually going to deny those very visible, obvious sets of reactions?
I agree, let's throw out the Z154-167 reactions. On to the Z186-207 reactions from a shot you posit around z186.
The main argument of the HCSA panel for a shot here (apart from the dubious jiggle analysis) is JFK's reactions before he passes behind the Stemmons sign - a 'hand freeze' and a very sharp head turn from right to left.
Firstly, the hand freeze simply doesn't happen. JFK is waving then slowly brings his hand down in a normal way:
As far the rapid head turn, this is easily refuted.
One of the main arguments for a shot before JFK goes behind the Stemmons sign is a quick 'head-snap' from right to left, presumably a reaction to the sound of a shot. However, on closer examination I believe it can be shown no such head-snap occurs.
Look at the hairline of JFK in the following frames:
In the top pic (z207, just before he passes behind Stemmons sign) the parting in his hair on the left side of his head can just be made out. Certainly the way his fringe sweeps up to the parting is clearly visible.
In the second pic (z225, first full frame of JFK emerging from behind Stemmons) his parting is not so visible but the sweep of his hair up to it is.
In the bottom pic (z230, JFK facing straight ahead) the part of his forehead revealed by the sweep of his hairline up to the parting is no longer visible.
Far from turning to his left JFK is still looking to his right as he passes behind the Stemmons sign (z207).
There is no head-snap to the left and, therefore, no reason to suspect JFK is reacting to anything.