I would argue that it was a matter of simple momentum...Frazier snapped his left hook, George rared back and launched his...it could be a matter of Ali being better able to time George's shots, but what does that then say about Frazier who 2 of the 3 times Ali fought him was a 1 armed fighter. Smokin' Joe ONLY had the left hook so Ali and everyone else knew where the power was coming from....just goes to show you what a brutal and devistating punch it actually was.

Joe Frazier had one of the best left hooks in boxing history....right up there with Joe Louis, Rocky Marciano, and Mike Tyson.