If you are ever caught in one, remember to find airspace near your head and use a swimming motion to reach the surface.  
,000 World War I soldiers were killed by them, and the mayor of a French alpine town was once convicted of second degree murder for failing to warn his town of one.  If you are ever caught in one, remember to find airspace near your head and use a swimming motion to reach the surface.  You could even use skis as a shovel. For ten points, identify the term for a cascade of snow down a mountain.
,000 World War I soldiers were killed by them, and the mayor of a French alpine town was once convicted of second degree murder for failing to warn his town of one.  
{Avalanche}