Kind of like the Challenger shuttle crash....terrifying and awesome event.

http://www.dailymail.co.uk/news/article-2137969/Challenger-explosion-video-Never-seen-footage-revealed-26-years-space-shuttle-tragedy.html

There are just situations where an avalanche, or a stroke of lightning, or a horrific pitchpoling, or whatever takes you and your mates. That's just part of being there. Rare, but when it happens you don't have a chance.