BBC Sport - Rio 2016 countdown: BMX crash causes seven-rider pile up

Crash, bang, ouch! Olympic BMX pile-up

BBC Sport continues the countdown to the 2016 Rio Olympic Games with the moment a massive pile-up in the men's BMX quarter-finals at London 2012 results in an easy victory for New Zealand's Marc Willers.

Watch full coverage of the 2016 Olympic Games across the BBC this summer.

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