[O.B.Left]

So vertical left hand cocking, hand motion, when done on a vertical plane would be vertical to the ground in terms of the cocking direction. Vertical left hand cocking done on a horizontal plane would be horizontal to the ground. But either way its a vertical left hand cocking (hand motion) in the direction of the Plane you are traveling which for us almost always an Inclined Plane, golf being a side on game.

Right hand motion on the other hand is Horizontal, only. The Plane of the Right Hand Bend, the RFFW. Weird but wonderful. How did Homer ever figure that one out? So contrary to what you'd think at first glance or after 30 years of glancing even. Most of us imagining both hands cocking vertically, together.