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Olympic mountain biker wrecks

Stefano Rellandini / Reuters

Hungary's Andras Parti reacts as he falls during the men's cross-country mountain bike event at Hadleigh Farm during the London 2012 Olympic Games, Sunday, Aug. 12.

Stefano Rellandini / Reuters

Hungary's Andras Parti lies on the ground after he crashed during the men's cross-country mountain bike event.

Stefano Rellandini / Reuters

Hungary's Andras Parti is helped by medics after he fell during the men's cross-country mountain bike event.