Bolt bows out in agony

Sprint superstar Usain Bolt ended his illustrious career in agony as he injured himself while running the last lap of the 4x100m relay race in the World Championships here.
Bolt, who was anchoring the Jamaican tea, limped after running a few meters and fell down on the ground in pain, holding his head with both hands in dejection.
Great Britain won the gold in 37.47 seconds while United States (37.52) and Japan (388.04) took the silver and bronze respectively.