Swing a heavy towel to feel the power snap
To teach the feeling of effortless speed, the instructor swings a heavy bath towel (strapped up) back and forth, letting it fall and snap at the bottom rather than forcing it. He says to sense the towel falling out so you feel where the zip and power come from, start small, and only later try to create a louder snap.
Channel: Danny Maude
Watch official source at 8:47Why this context matters
For stiff/wooden players who cannot feel the club release when told to just relax.