50 quadrocopters take to Austria's skies for synchronized swarm (video)

If AscTec's Hummingbird quadrocopters continue to fly around in your nightmares, you might not want to watch their latest video -- even if they resemble hypnotic robot fireworks. Ars Electronica Futurelab and Ascending Technologies teamed up for this latest show, programming 50 LED-equipped quadrocopters to frolic over the Danube last week. Watch them dance after the break.