FiveFrameSwing
Banned
What is it that you do at lag Fiveframe? "Fire" your hands? at LAG?
In the link you provided, I do something very similar to the pump-like motion that you’ve depicted. I can’t say why the pros do it, but for me it gives the feel of the top hand/wrist being fired/whipped. It’s the feel I have in my normal swing coming out of approximately the bat lag orientation
Energy transfer.
From a true lag orientation the top hand wrist will be fairly loose. The top hand wrist is set/loaded/bent. To get a feel of the unhinginging action, try to feel like it is the top of the forearm, just below the wrist, that is firing, while the tension in the top hand wrist remains loose.