Cheetah Robot is no plodder
Cheetah Robot from Boston Dynamics is a fast-running quadruped developed by Boston Dynamics with funding from DARPA. It runs up to 28.3 MPH, about 0.5 MPH faster than Olympian Usain Bolt's fastest 20 meter split. This version of the Cheetah Robot runs on a treadmill with offboard power. Testing on an untethered outdoor version starts in 2013.