Fighter Trevor Berbick carries the unusual distinction of having beaten the greatest boxer, or at least one of the best, in the world: Muhammad Ali. The bout took place, however, in the waning days of Ali's career in 1981, and though Ali ended up losing in 10 rounds, he still displayed the fire that catapulted him to the top of his game years earlier. This fascinating document of the champ's last hurrah is an interesting peek into boxing history.