And "agents" happens to be what Torrens rightfully calls them. He drops 300 of these agents on an urban street, where a convertible catches fire on the side of the road. The fire is generated by a physically realistic model, with smoke, embers, and mobile toxins subject to small eddies and turbulence between downtown buildings. The virtual pedestrians are subject to any number of real-world hazards--they can trip and fall and, if an ember lands on their hair or clothes, they can even catch fire. All are instructed to evacuate the area to safety on the right side of the image.