I was in the back room bagging up some breakfast blend when I heard shouting from the café. At that same moment, I smelled smoke and knew that my batch of Sumatran had caught on fire. I dashed to the roaster, flicked off the gas burners and closed the vent. I knew the routine. This had happened before. The cloth and rubber belt had broken, the drum stopped rotating and the beans ignited inside, fanned by the air being sucked in through the vents. Now my hope was that the flames didn’t make it into the chimney and light up the chaff that had no doubt built up inside. If that happened, we’d have to evacuate the café and call the fire department.