Avalanche: Humpy Chutes

We're still sifting through details, but here's what we know about a close call late Monday afternoon near Humpy Peak-

A group of sledders is riding in the Humpy drainage when one snowmobiler triggers a connected piece of snow on a steep, north facing slope which catches, carries, and buries another rider in a terrain trap (small gully). The rider tries to deploy his airbag, though is unable to successfully engage and he's buried with a hand sticking out of the snow. The sledder briefly loses consciousness, but everyone in the group is wearing avalanche rescue gear and they quickly locate the buried rider and dig him out. The group is pretty rattled, but after taking some time to regroup in the Whitney Basin warming hut, they ride back to their rigs and return home safely.. Whew... close call!