Australia's Torah Bright, the reigning X Games superpipe champion, pulled out of this year's event on Thursday after suffering her second concussion in three days.
She was injured while practicing a move known as the crippler. Bright was taken to Aspen Valley Hospital for further evaluation, but she's expected to recover fully and compete in Vancouver.
Along with Kelly Clark of the U.S., Bright is considered a gold medal contender for the Olympics next month. The Aussie has one World Cup win this season, at Saas-Fee, Switzerland, in November, and placed fifth at the 2006 Olympics, one spot behind Clark, the 2002 Olympic gold medalist.
American Hannah Teter won gold at the Torino Games, followed by compatriot Gretchen Bleiler with silver. Teter, Bleiler and Clark are all expected to contend for medals in Vancouver, with their toughest international competition coming from Bright and China's Liu Jiayu.