We always work head movement when we're sparring, and you really can't get better than Pernell "Sweet Pea" Whitaker. Now, he doesn't have to deal with elbows, knees, kicks, takedowns, etc, which frees him to be very liberal with his head movement. We probably can't be as active with our head movement when we have to account for other threats, but it's still a great example, and fun to watch!