I watched (tv) the fight between George Foreman in his comeback and some tall Canadian, named Lakusta (I think).
George got angry from a good blow and hit Lakusta directly on the head with a piledriver from space. It drove Lakusta directly into the mat and he did not get back up. Afterward, I think George was embarrassed by the momentary angry spurt which brought back the original Fightin George.
And yes, Foreman could hit like a battering ram.
I just rewatched it on dailymotion
Man....Foreman at 261 and 42 still had excellent wind
Lakusta was way out of shape or he was just struggling running from those sequoia trunk arms blinding him....19 inch biceps
But he came up off the mat from the first knockdown in the third and tagged Foreman with a right hand that stunned Foreman and man him stumbled for a second
Then as u said Foreman turned it up...and it was over.....total mismatch...a paid sparring event
Man the ring girl was hot hot...legs forever