WRIST
(Training the Top Hand)
Skip-a-Rock — 2 (Point Knuckle)
Same set-up as #1; now we add the focus of pointing the bottom knuckle of the thumb straight out towards the field, leading the top-hand-arm to full extension.
Wrist snaps first; knuckle points as the top-hand arm extends forward.
When the top-hand arm reaches full extension, the Pad of the thumb is on top of the bat.