"Personal Best - Butterfly" is a groundbreaking swimming instructional video starring the incomparable Michael Phelps and his legendary coach Bob Bowman. Basic tips for beginning swimmers and advanced instruction for developed swimmers Menu for coaching use complete with all camera angles in normal speed and slow motion Instructional insight from Bowman on butterfly stroke technique including head and arm positioning, underwater kicking, and more! Commentary from Phelps about his world-record setting swims