You could hit Mark hunt in the head with a freaking aluminum bat and he'd smile and kick your ass. Can Big NOg be KO'd sure, but Mark Hunt, never. He would have laughed at the punches from a young tyson.
to say someone cant be knocked out is just stupid, yeah people can take punches and keep coming but you get combos on that button of yours and your gonna go down, sooner or later you can be knocked out no one is invincible, imo its stupid to say he cant be knocked out