According to deepsnowsafety.org, 90 percent of people involved in Tree Well/ Snow Immersion Suffocation research experiments could not rescue themselves.
Skier dies after falling in tree well at Grand Targhee Ski Resort eastidahonews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eastidahonews.com Daily Mail and Mail on Sunday newspapers.