His sequence of shots doesn't make sense. He only mentioned 2 shots the day of, and later mentioned a third "wasted" shot fired before the car went under the overpass that was louder and scared him. The zapruder film shows shots at 160, 224, 313, and many witnesses heard a bang-bang with one sounding different most likely fired from behind the fence where skinny holland saw the smoke. He probably did see a fragment fly off towards the rear. JFK had a nice size hole blasted out of the back.