Doesn't look like this forum gets used much, but I have not been able to figure out how to get a more direct message to Michael, so here goes:
The ultra-high speed photography showing bullets clearly exiting the muzzles of the firearms they are fired from (mostly from Gunsite) appear to me, at least, to show the bullet exiting the muzzle before the firearm shows much if any recoil movement. If that is actually the case, then it calls into question a lot of our present theories regarding what actually happens to the barrel of the firearm during the bullet's travel down the bore. If what I am seeing is actually true and not just a photographic anomaly, then it would make for a very interesting and informative episode showing barrel whip in long barrels, muzzle rise in handguns with heavy loads versus light loads, the effects of resting the barrel on a hard object rather than the forend, and undoubtedly other subjects. I would love to see this explored further with the excellent technological advances in ultra-high speed photography.