Interesting thing about that rack shows me how simple he made the game. He ran 15 balls and only went to a rail 8 times with no rail on 7 shots.
Considering that the show was probably live, or at least unedited, he seems to have been lucky that his break left no clusters. Or was it luck?
He had only one problem ball and he got rid of that on the first shot. Notice how he caromed his first shot off the ball that was in a bad position right near the side pocket. He shot very fast but that was just about the speed I recall him shooting in those days.
Although he is quoted as saying there are only two shot speeds in pool - slow and slower - he seldom rolls a ball, he'll stun-forward instead. Pretty good left-handed too.