Think of the madison as a tag-team cycling. Two riders from each participating country. Spelling each other off as they tear around the track -- in this case, 200 times around the track in the Laoshan Velodrome in Beijing on Tuesday. The teams collect points for winning sprints held every 20 laps.
Tuesday, the Argentine team of Juan Esteban Curuchet and Walter Fernando Perez collected enough sprint wins to claim the gold, and what a joyous pair they were. Spain claimed the silver and Russia, the bronze.
Britain, which has been collecting medals like a homeless man collects empties, finished ninth.
And not too far behind them, placing 12th, was the Canadian team of Zachary Bell of Watson Lake, Yukon Territory and Martin Gilbert of Chateaguay, Que.
I like this overall shot of the track, taken by Paul Chiasson of The Canadian Press. You can see photos of the Canadians, and the other madison participants here.