From here:http://www.adn.com/2012/02/20/2327695/sole-avalanche-survivor-we-werent.html
'We weren't being idiots,'
"I pulled the trigger," she said, inflating two air bags attached to her backpack.
"Unfortunately, the freak accident happened," she said. "One of the skiers (above me) set off the avalanche."
"I was lucky. I'm alive because of a safety device that a lot of people aren't aware of," Saugstad said. "I want to get the word out that these packs are available and they work.
"If this wasn't a good example, I don't know what is."