This video is making the rounds on the hi-tech forums and sites. You’ve possibly seen it already. If not, the work these guys did is outstanding and amazing.
GorT did a sciene fair project involving robotics (in essence) back in the mid-1980s. It’s amazing to consider what was available and possible then (the “robot” was driven by an Atari 800 via the 4 joystick ports using valForth code).
Fullsize video here. and a previous discussion on multi-rotor flying robots here.