Quadrocoptor robot

A quadrocopter, is an aircraft that is lifted and propelled by four rotors. Quadrotors are classified as rotorcraft, as opposed to fixed-wing aircraft, because their lift is derived from four rotors.

Below is a clip of robot quadrocopter robots playing pong with a ball and is the most amazing display of robotic dexterity and teamwork

I always predicted robots would get to this level and more but its taken longer then I thought but this experiment must be a significant step in their evolution of the robots. Quadrocoptor robots that can can work together, amazing.