Usain Bolt falls during 4x100-meter final at World Championships

Fireworks for the winner goes off as Jamaica's Usain Bolt falls after suffering an injury, during the men's 4x100-meter final at the World Athletics Championships in London Saturday, Aug. 12, 2017. [Photo: AP/Frank Augstein]

Jamaica's Usain Bolt shouts as he prepares for his leg of a men's 4x100-meter relay first round heat during the World Athletics Championships in London Saturday, Aug. 12, 2017. [Photo: AP/Matt Dunham]

Jamaica's Usain Bolt lays on the track after he pulled up injured in the final of the Men's 4x100m relay during the World Athletics Championships in London Saturday, Aug. 12, 2017. [Photo: AP/Frank Augstein]

Jamaica's Usain Bolt lies on the track after injuring himself during the men's 4x100m final at the World Athletics Championships in London Saturday, Aug. 12, 2017. [Photo: AP/Matthias Schrader]

Jamaica's Usain Bolt, left, starts his leg in the men's 4x100-meter relay final during the World Athletics Championships in London Saturday, Aug. 12, 2017. Others are United States' Christian Coleman, Jamaica's Yohan Blake and United State's Jaylen Bacon, from left. [Photo: AP/Clive Brooks]