[Yoda]

The book states that the shoulder must be thrown at the start of the downswing. It doesn't state whether the forces throwing the shoulder come from active muscular forces in the upper torso or whether the shoulder turn is more passive in response to movements of the lower torso. That quoted statement also doesn't dictate whether any active shoulder turn (shoulder throw action) is due to rotating the right shoulder actively downplane (pushing action) or whether it is due to pulling the left shoulder forward (pulling action). Did HK discuss these issues and explain why one method is better than another method?

[Bold emphasis by Yoda.]

Per 7-15:

"With Swingers using the Arc of Approach (2-J-3), this actuation may be executed as a 'throwing' of the Right Shoulder by the Hips as in 10-19-C."