I have to say Ray Mercer KOing Tommy Morrison. Zab Judah is just funny, but he may have been able to recover if he had had time to get his legs. I was going to say Rahman because he got knocked out the ring, but that happened after a long, exhaustive fight; you could say that was as much a product of gassing out as that fatal punch. Ruiz and Morrison were both game opponents before they went nap-nap. Ruiz laid there like he'd had his spinal cord snapped but there's something about how Tommy Morrison just hung on that bottom rope like a tossed-aside puppet and how obviously out of it he still was when they stood him up. It was taking an executed dictator's body on parade through the public square for everyone to see. At least with Ruiz he was covered by a mass of bodies tending to his care and not making him get up.