 En route to location, the Canadian Pacific trains engine was  wrecked by a rock slide that killed the engineer. The actors were in  the car behind the engine and were battered by falling rocks but  escaped disaster. Just a few days later, a snow slide at Lake  Minnewanka threw several actors and cameras off an icy ledge of a  glacier. Meantime, actress Viola Dana was traveling to meet the  company when an earthquake erupted. Actor Tom London dislocated  three vertebrae in a fall. A carpenter broke his leg when he was  thrown from a barge into rapids and another actor nearly drowned in  the rapids.