Pswarm by the Dept. of Spontaneous Combustion

    "Pswarm is a mobile fire art installation featuring six hand-built peddle-powered sculptural fire machines. These machines include 15' long, 9' tall 2-rider behemoths weighing over 1,000 lbs each and geared to walking speed. Each features a propane fire effect capable of 40 ft plumes of fire. Together as a pack, these human-powered machines produce random, spontaneous fire effects." [Nakedsteel - PDF Image via loupiote's flickr gallery]