Adrian Bozman of San Francisco CrossFit covers the basic pistol (one-legged squat), modifications, and assists. He teaches several progressions and tactics for working toward success, for those who aren't yet able to do a full pistol unassisted.
He also presents, and demonstrates, some more challenging weighted variations, for those who are already solid on the fundamental move: single weight in front, asymmetrical load, one weight on each shoulder, and one-arm overhead load.
Adrian Bozman is the head coach at San Francisco CrossFit. He has been coaching athletes, regular Joes, and anyone who will listen since 2004.