His performance sealed a remarkable transition from 200 metre specialist to winner of the showcase race of the Olympics.
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Bolt only began racing the 100m in the last year, putting his fellow sprinters in the shade with his performances. He first really showed his threat in May, when he set a world record time of 9.72 in New York.
Much of Jamaica was expected to have clustered around televisions to watch the extraordinary run and will have jumped for joy at the run by the man dubbed "Lightning" by the media.