Revenge of the quadrocopters: now they move in packs (video)

In case you didn't find the original quadrocopter chilling enough, the GRASP Lab out of the University of Pennsylvania has gone and added a bit of cooperative logic to the recipe so that now multiple little drones can work together.
Also upgraded with a "claw-like" gripper that allows it to pick up and transport objects, the newer quadrocopter can team up on its prey payload with its buddies, all while maintaining its exquisite balance and agility. Skip past the break to see it on video.