New drone perches on walls like a robotic bird

The Multimodal Autonomous Drone (S-MAD) is a fixed-wing drone that has a few bird-like tricks up its sleeve. You can, for example, fly it like a glider through a room or open space, but when it approaches a flat surface the drone quickly changes configuration and lands flat with its little spiky teeth digging in to keep it from falling. In short, this is one of the scariest robotic behaviors