Pac hurts people with speed, accuracy and accumulation. Not power. Even at the lower weights this was true.
Though I wouldn't normally consider him a 1 punch ko artist, the shot that Martinez left Williams flat out on his face with suggests that there is a serious puncher there. Whether it was a one off, or is repeatable is open to debate, but in all seriousness, the last ko I seen as sweet as that was when Hearns left Duran in a heap...
Pac landed a tonne of punches on margo without stopping him. He is fast and has bite on his punches.. but most power p4p.. LOL
I've sat ringside for a couple of his fights, when he hits someone it sounds like a big wooden mallet hitting a pumpkin and he damn near killed Ricky Hatton, a bigger man, with one clean shot. Pac has serious ****ing power, you're fooling yourself.