7 crazy drone concepts

Who said drones need to be practical?

During this spring's "Harlem Shake" craze, a group of engineers at a South By Southwest hackathon programmed a drone to dance to the viral song.

Other hackers developed a way for a drone to take flight when a person flaps his or her arms. And hacker Ulf Schwekendiek found a way to control a drone with a wave of a palm.