[RSmithOpt]

Anyone with a inkling of understanding of momentum would realize that a persons body doesn't not 'react' to such force as when Kennedy's head snapped to the rear of the car for the 2nd fatal shot as the front of his skull exploded and the fragments also traveled to the rear of the car. That shot came from in front of the car. (Magruder film)

Watch enough hunting films and I do not think there's ever been one showing the animal being shot moving towards the direction of the muzzle of the hunter's weapon.

[Abathar]

I've killed enough animals to know that the way his head snapped back was from a frontal shot, not from the rear. I have heard people try to explain that his brains exiting the hole in the front of his head was like a champaign bottle shaken and the cork popped. The splash goes one way but the bottle (head) goes the other way. Thing is the head had to absorb all that kinetic energy as the slug flattened and slowed down upon impact, the second bullet had to come from the front.

[Toddsterpatriot]

You mean Zapruder Film.