Cornices, overhanging masses of snow and ice, are some of the most dangerous features skiers and snowboarders can encounter in the mountains. Whether a rider is above or below a cornice, they are in danger. Luckily, cornices aren't something that most skiers have to deal with, as they form almost exclusively in what many would term "extreme terrain."
For those who don't want to watch the video, here are the key points.
Follow along as legendary big mountain snowboarder Xavier de le Rue goes over strategies to mitigate the dangers posed by cornices. Thanks Xavi!