When you think about things you see at a ski report, a helicopter crashing is not on that list. You might see some people snowboarding or skiing, you might even see someone on a snow mobile, but helicopter sightings are pretty rare. That's why when two National Guard helicopters started flying low at a ski resort, people started shooting video of the action.
Chief Warrant Officer 5 Jared Jones said “As they landed the snow kicked up and the aircraft probably lost sight of the ground,”. That caused a hard landing and parts of one helicopter flew off and into the other Blackhawk. Here is some more footage of the aftermath.