Frame 157 was the first occurance of movement that suggests a shot has been fired. Both JFK and JBC turn sharply to their right immediately after frame 157. Although JFK may be reacting to the passing crowd, JBC's movement's match his testimony concerning the first shot: I heard this noise which I immediately took to be a rifle shot. I instinctively turned to my right because the sound appeared to come from over my right shoulder, so I turned to look back over my right shoulder, and I saw nothing unusual except just people in the crowd..."
|