Usain Bolt was in Philadelphia on Saturday to participate in the Penn Relays. The dominant Olympic gold medalist put on quite a show for the crowd, running his 100-meter leg of the 4x100 in just 8.79 seconds. More than 54,000 attended the event, the most ever in its 116-year history. Bolt's team, Jamaica Gold, won the competition in record time. Scroll down to watch his sprint.
WATCH: (via Sporting Blog)