Anyone else think Ali's knockout of Foreman was an early stoppage?

Have you not seen the first Patterson v Johansson fight then.
Actually Foreman hit Frazier on the side of the head - Johansson hit Floyd on the back of the head.

 

I love Joe but he was dazed and turned his back on George in concussed confusion I guess. The ref could have stopped it if he thought Frazier was quitting (although I doubt Joe knew how to surrender) but George kept punching as he was supposed to do. I don’t like seeing it but Foreman was just doing his job there I thought.