jiuwit rosas: [speaking spanish] interpreter: i had a friend indicating to me that the volcano had begun a more eruptive phase. patrick oppmann: jiuwit was working in support of local emergency services, and they told him to come up because they were going to begin setting up a shelter in case people had to be evacuated. jiuwit rosas: [speaking spanish] interpreter: when we arrived at the bridge area, i got out of the vehicle and started recording with my camera. patrick oppmann: shortly thereafter, you see this huge cloud coming down the mountain, just sort of engulfing a whole side of the volcano. jiuwit rosas: [speaking spanish] interpreter: we did not know what the danger was that was coming towards us. when, suddenly, we began to see that it was coming closer, closer, and closer. man: [speaking spanish] the volcano unleashed one of its most deadly weapons, a powerful pyroclastic flow. pyroclastic flows are hot, fast-moving currents of ash and gas. michael poland: they can go incredibly fast, hundreds of miles an hour, be hundreds of degrees in temperature. and they will just wipe ou