Horror moment hikers scramble down volcano as it ERUPTS under their feet sending rocks and fumes billowing into the sky

THIS is the horror moment hikers run for their lives as a volcano erupts under their feet and spews choking plumes of smoke. Harrowing footage shows the tourists mere metres from the crater when the volcano exploded into a mammoth cloud of ash and flying debris. One heart-pounding clip filmed by a fleeing tourist showed...