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Video - Lamaze wins equestrian jump-off
Canada's Eric Lamaze won Olympic gold in the individual show jumping after winning a jump-off against Sweden's Rolf-Goran Bengtsson in Hong Kong.
The pair were the only riders to post double clear rounds but after Bengtsson knocked down the final fence in the jump-off, Lamaze went clear again.
American Beezie Madden won bronze after winning a separate jump-off involving the seven riders with four faults.
Britons Tim Stockdale and Ben Maher finished 16th and 20th respectively.
Both men were among the 10 riders to go clear in the first round, but they struggled with the much harder course set up for the second round.
Stockdale, riding Corlato, knocked down four fences for 16 faults, while Maher, on Rolette, had five down for 20 faults.
"It was one round too many for her," said Maher. "She jumped the first round fantastic but in warm-up I just sensed she didn't really feel she wanted to go again.
"She wasn't the same horse in that round. It is disappointing, but that is the way it goes.
"I came here looking to win, otherwise there is no point taking part in the Olympics, but I am pleased with how I have done."
Barely an hour before the start, four riders including Ireland's Denis Lynch were banned when their horses tested positive for the banned substance capsaicin.
Bernardo Alves of Brazil, Germany's Christian Ahlmann, and Norway's Tony Andre Hansen were also barred.
Conditions for the final jumping round were among the most challenging the riders had faced throughout the Games events, with a typhoon officially forecast in Hong Kong.
Some riders complained of the heat and humidity after completing their rounds.
But Lamaze's victory on Hickstead sealed his place at the top of world show jumping, a position that was joepardised in the mid-1990s by drugs scandals.
He missed the Atlanta Games in 1996 after testing positive for cocaine and was dropped from his national team.
But a four-year ban was cut to seven months when he convinced authorities he had used the drug recreationally and not to enhance his performance.
He was barred from Sydney in 2000, over drug use too, but a lifetime ban was lifted and he was able to return to competition.
"It is a dream come true and something I have been waiting for for a long time. The wait has been worthwhile," Lamaze said.