Video pictures (9 frames) and the appropriate technical/ biomechanical explanations for Michael Klim at 25 m of His Gold Medal 100 m Butterfly Race at the 1999 Pan Pacific Championships in Sydney. It is possible that Michael Klim could swim much faster if some of the "inefficiencies" commented on in this analysis were eliminated. Most of Michael Klim's "inefficiencies" stem from his rigid arm recovery. Such actions cause excessive lateral forces that are evidenced at entry. Perhaps some slight bending at the elbow in the middle of the recovery would orient more kinetic energy forward. There possibly could also be some conscious elevation of the shoulders as the arms enter to produce a reaching forward action rather than a sweeping in movement.