RunBot ain't a true runner yet, being that one foot needs to be on the ground at all times. And it's only fast from its height, managing a swift 3.5 leg-lengths per second, besting the MIT's four times taller Spring Flamingo, which runs at comparably sluggish 1.4 leg-lengths per second. Regardless, RunBot currently holds the world record for fastest bot on two legs. The RunBot's German and Scottish creators attribute its speed to the fairly simple design, which only senses when a leg is on the ground and when a leg swings forward. RunBot merely experiments with whichever leg motions keep it upright and keep it going fastest, and the bot can accelerate up to three times its original speed with its "learnings." So far the RunBot can only walk in circles, since it's attached to a boom in the center of a room, but the developers say they're at work on a freestanding version, which shouldn't be too tough because the boom has little influence on the RunBot's walking.