Lockheed Martin’s Samurai Monocopter
Eventually, the SAMARAI project was supposed to produce a nanomonocopter (?) about the same size as a seed pod (on the order of 1.5 inches long and 10 grams in weight), driven by a miniature rocket or jet thruster, able to send back streaming video (that was stabilized somehow), autonavigate, and deliver a 2 gram payload up to a kilometer away. The big version in the video above was a testbed to help engineers figure out just how to get this thing to fly in a stable and controllable manner.
Video via geekologie.com, who still want a jetpack.