Here is a recent Q&A that I thought might benefit all readers.
Q: Does TGM say it's not possible to Swing (Pull) and Hit (Push) at the same time, and if so, where?
A: You can push on the Left Arm (with the heel of the right hand) to support the pull of Centrifugal Force on the Clubshaft. If you push on the Club -- and actually succeed in overriding CF (which has its own very steady way of doing things and will oppose any attempt to change it) -- then you are, by definition, Hitting. However, in so doing you will more than likely have pushed the Club ahead of the in-line condition CF was seeking and will experience Throwaway.
I get this strange feel sometimes that PP#1 is pushing down on pp#2 as pp#3 is squaring the clubface. That heel of the right hand snaps down on the left thumb a feels like a hammer on a gun.