Usain Bolt powered the Jamaican men to a world record victory in the 100 metres relay at the Beijing Olympics, his third world record and third gold medal.
But Jamaica couldn't sweep the sprints with their 4 X 100 metre women's team bungling their baton change to hand gold to Russia.
Sherone Simpson failed to get the baton across to Kerron Stewart, the woman she shared the 100m silver medal with, and the Russian sprinters seized their chance.
Bolt gave an assured performance on the third leg of the relay, safely handing the baton to former world record holder Asafa Powell, who powered home in 37.10 seconds, knocking a solid three-tenths of a second off the 15-year-old American record.
The new men's relay record underlined by how far the Jamaicans have eclipsed the United States, the traditional track superpower, at this Olympics. The American men and women were knocked out of the relay heats by embarrassing baton fumbles.
The United States can claim some redemption on the court tomorrow however - they play Spain in the men's basketball final after beating the defending champions Argentina 101-81.
Spain beat Lithuania 91-86 in the other semi-final.
And the Netherlands won the women's hockey gold medal by defeating China 2-nil.