Silence precedes the eruption. Then the ground beneath you rumbles, shaking loose dust and debris from the cavernous ceiling. Rocks come rattling down the cave walls. A groan issues from the earth itself, forecasting the explosion to come. And just as the rumbling reaches its zenith, the geyser erupts, discharging a steaming hot pillar of water that splashes against the cavern's ceiling. It rains down in a mist.
