“Everything we’re doing has this idea or concept of chasing center, and if he deflects, change.  Chase center, change. So if he punches me, this is not chasing center. This is chasing center. If he takes the hand back, and this moves forward, that continues to chase center. So I’m always driving from the ground, forward, with energy through the elbow to the center of mass. Never across his body. Never chasing hand, but always moving forward. Always toward his center of mass. Changing is, I can’t go forward, so I change. I change the shape. I change my angle. And then chasing center. … This is what we’re really trying to capture in our practice of Chi Sao.”
Greg LeBlanc