Footage of a "planned" man-made avalanche on Ajax Peak in Colorado, USA.<br /><br />The video, filmed on January 26, shows the snow churning down the mountainside after explosives were dropped from a helicopter to trigger the avalanche. <br /><br />According to the filmer, "this work is performed most years so an avalanche does not occur at an unplanned time when people are present on the road below."
