From 1985 to 2005 American professional boxer Mike Tyson reigned as the undisputed heavyweight champion of the sport. At just 20 years old, Iron Mike became the youngest boxer to win the heavyweight title and went on to win a total of 50 fights in his career - 44 of which were straight knockouts. Prepare yourself for a hard and fast 4 minutes and 30 seconds as we recap ten of the legend's fastest KO's in history.