One of the more reassuring things about industrial robotic arms is that they tend to stay put. Well, not this one. Clearpath Robotics, a company that specializes in building mobile automatons, has strapped a Kuka robot arm to its omndirectional Ridgeback platform. The company hasn't said what sort of tasks the hybrid bot is meant for, but one could imagine it making itself useful in lots of different ways—even if the vision of a disembodied arm rolling its way toward you is a little bit disconcerting.