Here's a correction OP for 50 Reasons, 50 Years OP

[William Seger]

139. Yep, that's exactly the same thing Fiester was talking about

... which is NOT anything like the 2.5" forward head-snap. The only thing I've seen her discuss and demonstrate with similar videos is that same thing, which is basically a hydraulic effect: The bullet creates a pressure wave in the viscous gel that propagates in all directions, including making the gel bulge back toward the gun. That pressure wave is indeed the source of back-splatter from a bullet hit. But, as clearly seen in your own evidence, since that pressure wave is in all directions, it does not and cannot result in the entire block being thrown back toward the gun! As clearly seen in your own evidence, the net movement of the block is in the direction of the bullet.

Furthermore, JFK's "ballistic gel" was enclosed inside a skull, which the bullet had to pass through twice, and skulls don't behave very hydraulically. They behave more like billiard balls: The force applied by a blow to the skull will accelerate the head along a vector from the contact point through the center of mass. The net result is more like an egg, which is that while some of the energy of the bullet will go into throwing material in all directions, the momentum transferred to the remaining mass cannot be back toward the gun.

Coincidentally, last night I watched the Discovery Channel's "Inside the Target Car" show. As you probably know (but I didn't), they simulated head shots from different directions using realistically modeled heads. You probably also know what they concluded about the grassy knoll theory, but here are two frames from the test simulating a 6th-floor TSBD hit:



How about that: a forward head-snap.

Q.E.D.

> ... and repeatedly the sources of your conclusions have been shown to be wanting.

Good one.