During a boy scouts summer camp, we were on a separated camping area near a railroad track. We created a fireplace and used some stones from the track to build the fire on.
A pretty big mistake as it turned out. Because the stones were in fact vulcanic, they exploded when heated - so we were bombarded with stone fragments.
A pretty big mistake as it turned out. Because the stones were in fact vulcanic, they exploded when heated - so we were bombarded with stone fragments.