Quadrotor Drones Can Juggle Balls With Each Other

We've already seen the murderous quadrotor drone juggle a ball with itself, but that was just child's play! In this video, the quadrocopter plays a bit of catch with a human target and even bats the ball to and fro with another quadrotor drone. They keep the ball up in the air for quite a long time too. [Robots.net]