Mayon volcano is an active volcano in the Philippines, known for its perfect cone. Despite being one of the most active volcano, it is often being climbed by adventurers.
7 may 2013, a sudden eruption killed 5 climbers (various sources claimed different nationals being killed, although it is comfirmed that at lest 2 german, a local philipino guide and 2 other people were killed)
http://news.sky.com/story/1087620/phili ... kills-five
Someone i knew with his group happen to be climbing Mayon as well when eruption happens, which also happend to be their summit day.
The group of 6, including a local guide were forced to run down the 40-50 degree rocky slope for their lives. In the event, 4 of them injured, one of them a thai national, was in bad condition and unable to continue. The group reached the based camp, and a rescue team was send. The thai national was found at 1872m above sea level, dehydrated, broken right arm and burnt marks on his neck, alive and in stable condition.