Here is the problem with the 911 conspiracy theory's......

[William Seger]

124. No, it's your claimed "DELAY due to inertia" that's imaginary

Momentum transfer is instantaneous; there is no "delay due to inertia." The bullet passed through the head in less than a millisecond, and by the time it exited, it had lost most of its momentum by slowing down. The head gained exactly that much momentum during that exact same millisecond by accelerating, and it accelerated only during that exact same millisecond -- no "delay due to inertia" whatsoever. To say that "the greater its mass, the less a body accelerates under given force" does not imply that there is any delay in that acceleration.

I've mentioned several times that there is a lot of information about the forward head snap on the web, but it would appear that you haven't researched it. Here is a precise mathematical analysis of the forward snap that was done by a physicist. Apparently, he isn't aware of this "delay due to inertia" either, so maybe you should send him an email.

And no, the forward motion is quite real, not an effect of the horizontal blurring in frame 313, which is due to camera movement. In the gif I did, and in the one I posted from another site, the alignment was done to lining up the right edges of the blurred areas in 313 with the right edges of the same areas in 312. That means that all of the motion blurring in 313 is toward the left, relative to 312. That was done specifically to make sure that any apparent motion to the right was not really the result of motion blurring. But in fact, the boundary between the back of JFK's head and the car is clearly seen to move toward the right in all three gifs I posted, as well as in all the other examples you will find on the web. That is quite unlike the left edge of Connally's head, for example, or the left edge of any other object in the frame, all of which show an "apparent" motion to the left which actually is due to the blurring. Sorry, but you're imagining things again.