Take the punch Lesnar landed on Heath Herring and the shot Carwin knocked the tall dude out with (forgot his name.) Stick them side by side and they look like identical punches. Left hand lines it up followed by a fully extended right. Brocks fist is like half the size of Heath's head and sends him FLYING, but doesn't put him out. Carwin's punch lands on the jaw and sends dude's mouthpiece flying away. The definition of KTFO. Lesnar's punch is spread out over a wide area and doesn't catch the jaw the same as Shane's punch does.
I think that if Lesnar's punch actually hit Herring's jaw it is done right there. Instead he caught above the jaw and smashed Herring's face in.
Both men are bad match ups for Nog.