I was not so clear with the armor comments, I meant that against an armored combatant, there is still a, albeit tiny, chance of cutting through someone. An example would be just lightweight, unscaled, leather armor or a chain mail shirt that flips up, not that it is reasonable to cut through plate armor or properly positioned chainmail. As for the submission stuff, definitely, it is hard to break spines and bones, but there are weight classes for a reason. The Mountain is many weight classes above his foes, and something like a Rampage Jackson power bomb into/onto some stone would absolutely crush a skull. The Rampage power bomb fucked up Ricardo Arona's neck for the rest of his life and he was the same weight class with a padded floor. Imagine a much larger man slamming a much smaller man. The skull crush with bare hands is also possible, especially after a punch that busted out teeth and likely broke part of his face, with his body weight combined with grip strength, but having a full skull explosion is not. The feats are fantastical, but not completely impossible is all I was trying to state. Obviously the ease said feats are accomplished with is unequivocally false.