This is incredible - quadrocopters autonomously throwing and catching poles (inverted pendulums):
With all the talk about the use of drones to kill terrorists and the debate whether or not to use them within the boundaries of the United States, it seems odd to me that no one considers that this technology forms the basis for personal drones. In about ten years, for a few hundred dollars, anyone will be able to build an incredibly maneuverable autonomous drone that will be able to find and destroy a target.
Technology is wonderful but dangerous.
HT: Marginal Revolution