Probably a really crazy sub. KO's can happen due to power or just a guy ducking left when he should have ducked right, and in that sense a really clever sub seems more skillful to me. Do Bronx's calf slicer, Mir's reversal to a kimura on Big Nog, Mayday's sudden RNC on Kanehara, Tate making Holm squirm and then nap....so good. And probably less brain damage for the fighter in later life, so win-win!