Tyler DeWitt and Evan Hannibal were slowly making their way down a windswept slope during a backcountry snowboarding excursion in Colorado last spring when the shallow snow beneath them shifted and broke loose. "Avalanche!" shouted DeWitt. Hannibal's helmet cam captured the moment and the tense, profanity-laced exchange that followed as the slide near the Continental Divide gained momentum. The experienced backcountry snowboarders weren't injured, but the avalanche buried a service road in about 20 feet of snow and came dangerously close to Interstate 70, a major route for ski traffic. As soon as they were safe, the two men called 911 to report the slide and spent two hours at the scene describing what happened. They shared the video and offered to send photos. They thanked investigators for showing up. Hannibal described the interaction as cordial.
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