Olympic gold medalist Hannah Teter sustained a concussion after a hard fall in the halfpipe at the U.S. Open.
Amen Teter told The Associated Press that his sister was knocked unconscious for about 25 seconds and was resting at her parents' home Saturday evening in Vermont after being released from the hospital.
Amen Teter said she crashed onto her back after trying "a pretty large 9" - a 900-degree spin off the top of the halfpipe. He said it was "probably the hardest fall she's ever taken."
Hannah Teter won gold at the 2006 Turin Olympics and silver at the 2010 Vancouver Games.
The 25-year-old snowboarder has been involved in a number of charity projects, selling everything from underwear to maple syrup to benefit the poor in Africa and elsewhere.