Less than a minute. That's all it took for Japanese BMX rider Sae Hatakeyama's Olympic dreams to crash as she fell and broke her collarbone in her very first run of BMX racing's quarterfinals on Thursday.

Hatakeyama's exit will prove to be particularly painful for hometown fans, who also saw her male counterpart fail to qualify for the semifinals.

BMX racing, an official Olympic sport since Beijing, is known as a high-octane sport with elevated risks of injury.