The risks of visiting volcanoes

In 1993, Stanley Williams survived a close-encounter with a volcano. A volcanologist, he was standing on the rim of Colombia's Galeras volcano when it erupted with little warning. Six of his scientific colleagues and three tourists were killed. Williams fled down the mountain's slope — until flying rocks and boulders broke both his legs. With a fractured skull, he managed to stay conscious enough to huddle behind some other large boulders and dodge flying debris until the eruption ended and his grad students rescued him.
The risks of visiting volcanoes