Nine Britons and an American were on a guided tour of the Tian Shan mountains in central Asia when ice and snow suddenly began to bear down on them. Harry Simmin, 27, a captain in the Royal Engineers, had briefly broken away from the group to take pictures when he heard “the sound of deep ice cracking behind me,” according to an account he posted alongside the video. He captured footage of the moment the avalanche began to fall from a distant peak and made its way toward him, gathering pace and mass, before finally falling behind a boulder. The
