I have ignored it because it's irrelevant, and any attempt to explain the motion is nothing more than speculation.And he failed. No slab moved upwards like in his last experiment. The only experiment that had any resemblance with the real thing was the pizza stands one. A fact that you have repeatedly ignored.
The pizza stand experiment does not show any "crush up" motion. If the experiment can not duplicate the "crush up" theory, then the theory is wrong.