I still can't get over that perching bird drone which seems to have been designed without any concept of basic physics. It takes off via a single rotor, has no

I still can't get over that perching bird drone which seems to have been designed without any concept of basic physics. It takes off via a single rotor, has no means of anti-torque, yet doesn't spin around uncontrollably during take off. It's like they asked an eight-year-old to design a drone, and then just prettied-up his drawings in 3D without talking to any engineers.