? about Pacquiao's punch mechanics

He seems to lift off his legs too, with those huge calves of his. Sometimes he'll leap in and he gets off balance but he doesn't miss too often when he throws himself in, JMM fight 2 being a big exception. He got countered alot because of his throwing his balance off so often.

 

Naseem was rightly mentioned earlier, and in his case I think he generated power from even weirder angles like leaning backwards. I his case I thought he had mastered the art of transferring all momentum and energy into one point of release. (kind of a long hand kung fu theory)