Reminds me of Mike Austin's quote "I keep my head steady and I swing my hips. Like a pendulum."
Basically the essence of a snap release via serious float loading, such that you load and unload at very nearly the same time (cracking the whip at your aiming point). It can be helpful to user mid-body hands at address if using this approach, especially as a swinger.
It almost 'feels' like the grip end is starting to unload as the shaft and clubhead are still loading, just like a cracking whip.
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Mr. Lee calls this a "GRAVITY ASSISTED ROTARY WHIP-SLING."