7 / 14

Usain Bolt

Usain Bolt of Jamaica celebrates after crossing the finish line to win the gold medal in the Men's 100m Final on Day 9 of the London 2012 Olympic Games at Olympic Stadium on August 5, 2012 in London, England. (Photo by Pascal Le Segretain/Getty Images)

Unusual rituals of Olympians

A look at some of the pre-competition rituals and lucky charms that top Olympians use to help their chances. -- By Carla Thorpe, Yahoo! Sports