Usain Bolt might have taken home the 100 meters gold medal from the recent London 2012 Olympics, but things could have been different had DARPA’s Cheetah robot been allowed in the field. Living up to DARPA's original goal of developing a robot that could outrun any human, the quadruped robot has set a new robotic land speed record of 28.3 mph (45.5 km/h) for a 20-meter (65.6 ft) split, bettering Bolt’s human speed record by 0.52 mph (0.8 km/h).
This is interesting because it shows the speed that can be accomplished in a very complex set of robotic actions. I see this thing running at high speed and imagine a bird running to take off while flapping wings. With a man inside of course.