What the six don't know is that the wind has split the ice. Open water lies ahead. The men on shore see the first red light vanish. One by one, the others disappear. The snowmobiles have followed the leader off the ice into deep water a quarter-mile out.
Rescuers rush to help, but four men are dead.
Scores of fishermen are miles offshore in cars arid snowmobiles. Suddenly, a winter storm kicks up. Headlights flash as all race for shore. But these sportsmen aren't aware that even thick ice bends with the weight of each vehicle. And when a car moves on ice, the bending wave travels with it, creating a constant ice wave that may spread 100 feet in all directions.