Even in John Orr's scenario, which has the bullet passing through JFK, nicking the windshield molding and exiting the car, but not hitting JBC, there would have been a bullet whizzing through the car. It appears that Jackie and Kellerman also flinch noticeably in the same direction as JBC at the same time. Can we be certain that JBC's reaction, which is certainly noticeable, is a reaction to being hit? I just tried turning my head several times, and it actually seems quite natural for my one shoulder to rise in the direction I am turning. The faster I turn, the more it seems to do it.