The first free flight of Unreasonable Rocket's Blue Ball, a peroxide monopropellant vehicle. I've seen a lot of rockets fly, and it's still amazing to see one hover on a mostly invisible plume of steam. The rocket runs on hydrogen peroxide and is controlled by jet vanes in the engine exhaust. unreasonablerocket.blogspot.com Filmed by Ben Brockert of Masten Space Systems, masten-space.com