Track and Field, 100m and 200m Jamaica Strength: Incredibly long legs allow him to finish the 100-meter dash in just four strides World Records Held: All the good ones Weakness: Amazingly fast up to 400 meters, but any farther than that he gets nauseous and starts vomiting Shoes: Got his one pair all covered in sand, but is planning to get new ones at the Olympics Favorite Showboat Maneuver: Sawing own legs off during final 10 meters NEXT: Oscar Pistorius 