I think what sets Zab apart slightly here is that after the low blow, which he put all of his might into... possibly his best punch of the fight, he locked onto his target, saw that it was the back of Mayweather's head, and unloaded. It would be like throwing a consecutive 1,2 combo at someone's balls.

After the one, your conscious is supposed to say, "what the hell did you do that for? Don't do it again."

Where Zab did, had a second to think about what he just did to Mayweather's balls, and then said, "what the hell" and unloaded on the back of his head.

Everyone is talking about how that scuffle screwed Judah's chances up... how about the fact that Mayweather took leather to his members whom are probably 'Swollen Members' now... and then a shot to the back of the head?

Either way, fouls are just bad. I was watching MMA today and they manage to hit each other in the balls less even though they are hitting to the thies... inner thies even.