Manny Pacquiao's Last Knockdown

[Taeth]

I remember seeing this fight, anyway i thought it would be interesting. For the people who haven't seen it so here.

http://uk.youtube.com/watch?v=J_jzIhUZcg8

Manny Pacquiao Stopped by a body shot
http://www.youtube.com/watch?v=O4qwBzJKrXY

Manny Pacquiao Knocked silly from one punch
http://www.youtube.com/watch?v=pHxHNC0ntUg

Those were both body punches, but in the second one Pacquiao was badly weight drained.

Its amazing to think early in Manny's career he was 11-0 with only 4 KO's. How often does it happen that the future heaviest p4p puncher in the sport has difficulties KO'ing early opponents? The only other guy I've seen with something similar is Hagler, he almost KO'ed everyone once he came champion, but earlier on he had a lot more UD.