Skier accidental Thar

Open slope near top of Mt That run. Skier A skied through trees adjacent open slope. Skier B descended and cut wide into slope and triggered small pocket, going for 20m ride but staying in surface. Propogated to slope above Skier A, catching him and taking him for 40m ride through sparse trees. Snow was recent wind transport, soft slab. Approx 100m wide and ran 150-200m.