It's a Parrot ArDrone quadrotor. The frame is made of foam which encloses the rotors and the motors automatically cut off if they sense the blades are obstructed.
Being hit by one is like being bumped with a bit of polystyrene.
Being hit by one is like being bumped with a bit of polystyrene.
(HN is so pedantic)
Seven dead astronauts taught me to distrust intuition about foam.