The pendulum stroke has been taught by many instructors for decades. If you look on youtube you can find pros giving lessons on stroke, or the mechanics of the stroke. If you have a true pendulum stroke the tip will dip towards the cloth or touch the cloth on follow thru, there's no where else it can go. If the grip is loose and and your hand finishes at your chest, or near it, the tip can't go anywhere else, has nothing to do with POOL, it's physics or something. Lay a stick level, with the shaft resting on the rail, just holding the butt with your grip hand. Now lift the butt up, the other end goes down
This looks pretty much like the correct stroke to me for pool: https://www.youtube.com/watch?v=SfiV69Qx1f0
Appears to be a, combination of pendulum & piston, with a measured forearm drop at follow-thru!
This guy can play a little bit!
