That's about the quickest I've see a fighter's chin go from rock solid to shaky. I don't think Peter can take a shot anymore. :-(
Maybe it wasn't ever that good? I know people said he had an iron chin after the first Wlad bout, but Toney stunned him, McCline dropped him three times and he's since been stopped, twice badly.
Peter has now entered the 'Tyson v Peter McNeeley' phase of his career. Time to cash in his 260lbs worth of chips and call it a day.
...and after this brutal KO loss, he'll be even more vulnerable. He'll be on the receiving end of a few more devastating knockouts if he continues fighting.