Bodyguard is a Parrot A.R. Drone 2.0 mod that transforms your quadrocopter into a personal security guard. It follows you around silently when you don't need it, and lets you take over via an intuitive Myo-based control scheme when you do-- giving you the power to shoot down your enemies with a mounted rubber band gun.
The video above was shot on low battery, so its behavior is a lot more erratic than it would be at full charge. Unfortunately this draws power like there's no tomorrow (or rather, no 5 minutes from now), since the battery on an A.R. Drone only lasts ten minutes anyway, and to save weight we hooked up the Arduino to the drone's battery, further increasing the power drain.