I really see it as almost entirely Ortiz's fault. He basically had lost the plot by the time he threw that headbutt, I feel it was just a matter of time before he found his own way out given those antics. He headbutts Floyd blatantly, like cartoon style, then goes way out of his way trying to hug and make up, rather than just touch gloves once as is the norm(and which they did, before Ortiz goes in for another hug). I feel it was a punk move by Mayweather, but completely legal and somewhat understandable given the nature of the butt. It sucks that we didn't get to see a good fight, but I really doubt Ortiz would have given us much more entertainment regardless. If this had been two lessser name fighters on an undercard I imagine people would just say "oh yeah that was badass".