Create swing speed through body separation
The speaker explains that speed in the swing comes from separation - certain parts of the body staying still while other parts move. He shows the lower body staying pretty still while the upper body rotates to produce speed, so that some parts go slow to let other parts, like the arms, move very fast.
Channel: Todd Graves
Watch official source at 0:27Why this context matters
Delivered as a live swing demonstration in an instructional short.