pretty much it. He got excited after that big punch on the 2nd round, and throw out the gameplan. He was literally looking for a one big KO punch all night without even setting it up with jabs or feints.
I rewatched the Cotto-Mosley fight this morning and noticed Shane got pretty frustrated in there too. He was only looking for big shots instead of trying to set them up with jabs or feints. Cotto was easier to hit than Floyd so that's why the Cotto-Mosley fight was much closer than the May-Shane fight. I'll see the May-Shane fight soon over a buddy's house.
All those shots did was **** Mayweather off. He took them like a champion and then came back and whooped Mosley's ass.
Mayweather just did a great job, he had enough power to surprise Mosley at times and was perhaps much faster than what Mosley expected. Mayweather clinch perfectly and survive a potential knockdown. You got to give credit finally to Mayweather for finally stepping up to a true welterweight since his Judah fight.