Which Z frame was JFK hit? How do you know JC wasn't reacting to hearing a shot - he was startled at hearing the crack of the shot?
So let me get this straight in the following gif, Connally throws his right arm up, shifts dramatically in his seat and his jacket just happens to billow at precisely the same moment as Kennedy is reacting and Connally is simply hearing a loud noise?
Btw there was reportedly plenty of motorcycle backfiring, did anybody say that Connally was jumping around like a hyperactive jackrabbit as they passed down Main street?
JohnM