Rewatched Mosley's right hand in round 2 on SkySports Highlights

The first punch stunned him, but not enough to make him lose too much. He was even able to tie up afterwards. After taking the second punch, Mayweather stumbled but immediately got his guard and legs back. His guard came back immediately after the punch, and I'd say his legs were good about 4 or 5 seconds later (maybe earlier, but I know for sure they were back in that amount of time). He was swinging back about 7 seconds after, and also took control of the round, landing two big rights of his own about 12 seconds after the right hand that sent Mosley flying back into the ropes, and and good left too. After seeing this, I'm positive that Floyd has a solid chin. Here's a video that shows it. The action starts at 1:12. Now if you look at how Margo took took the right hand after being stunned, his guard and legs were completely gone. Go to 0:16. And look at how a prime Cotto took the right hand at 3:21. This one wasn't even as deadly as the one Floyd took.