Many people that saw the photos of the avalanches from Bridger Bowl yesterday were probably scratching their heads, wonder why runs that were so skier compacted would slide. Thanks to the Gallatin National Forest Avalanche Center and Bridger Bowl Ski Patrol we now have some answers. This informative video discusses why such slides can occur. The sheer destruction is pretty incredible. Thanks to Gallatin National Forest Avalanche Center and Bridger Bowl for such an informative video.