Guys, stop it down at 8:31 and understand Rhythm -- the Left Arm and Clubshaft In-Line through Impact.
With the Clubshaft still stressed with its Lag Pressure Point Pressure, it is the Secret of the Game.
Also, note Ben's willingness -- in fact, preference -- to execute his swing in slow motion. He knew precisely every move he made, and he demonstrates it here. Some twenty years later, he did exactly the same thing in this 'home movie': http://lynnblakegolf.com/index.php/V...ome-Video.html
With or without a ball . . .
Fast or slow . . .
Ben Hogan understood his motion and could demonstrate.