Sorry to disagree with you all, I was a boxer for two years and Mayweather was using a defensive tactic, not running. He was getting away from the ropes and staying in the center. Some punches which look like they hit actually didn't, Mayweather has a very good defense stance, if you look at punches thrown by Manny in slow mo, you'll see barley any actually hit Mayweathers face, they just getting the gloves. Manny had a hit percentage of 19% and Mayweather ended with a 34% hit rate.
5. Correct me if I am wrong, but didn't at one point Mayweather punched Pacquiao below the waste?
It was a very borderline shot, could be argued by many that it was low, however I saw it as very borderline so did the commentators. Still very risky to go that low though.
Edit: The hugging is actually called clinching, it's a technique used by a lot of boxers, it's a valid technique to use to get away from ropes and out of trouble. 🙂