Not entirely sure of the details, sounds like when the accident happened, he was not using his Bros and may have been on a "cheap slalom ski". He had already broken a few skis (BROS with massive amounts of metal and carbon fiber) and had made a comment along the lines of "any day I don't break a ski or a bone is a good day". He was complaining that the binding on his last ski he had only went to 20 if that gives you an idea of the force being put on his gear.
The course did not sound appropriate for sit skis at all, check his blog at THEANDYCAMPBELL.com to get updates from the past few days, where he talks about the size of one of the hits. I wouldn't be surprised if there aren't more injuries from today's race. A couple of days ago he said something about the high likelihood of getting hurt, he had a really hard fall one day and thought he had broken his back again.
Pretty sure it was on a large gap. It was in the qualifiers and a team from Warren Miller was there taping, I guess they've already told him the crash along with some other stuff is going to be in next year's movie. He did finish the run.