Avalanche Chasing Train

The ultra-wide aerial camera starts atop a snowy peak several miles high, then rapidly dives toward a train entering the mountain pass. An avalanche collapsed and poured down behind the train, filling the valley with a moving white wall. The camera glides along a ridge parallel to the tracks, then swings into a wide arc, keeping both the train and the avalanche visible as the train rushes toward the tunnel. It ends with a rapid ascent, showing the avalanche swallowing the mountain pass behind the tunnel entrance.