Amazingly cool and interesting plane footage

Next level helicopter control, there is music over it too (warning)

Like a little Fairey Rotodyne.

I'd guess they are running the rotor at pretty low speeds to prevent the retreating blade stalling. They claim it can cruise at 400kph, which is about the Lynx's speed record. I doubt you'd ever be able to stop it completely though as the blades wouldn't be strong enough. The Sikorski X-Wing was intended to stop the rotor complete but had much thicker blades, and demonstrated flight without the blades fitted, but I'm not sure it ever actually flew with the X wing.

At a high speed you’d have to have a high rotor rpm, not a low rotor rpm to prevent retreating blade stall. The slower the rotor rpm at a given forward speed, the closer it comes to stalling in the retreating direction.

I used to take those Harrier displays for granted. I lived in a flat exactly on the centre line of the Southend airshow, so they would hover directly in front of our balcony. We would usually get an RAF one and a Navy Sea Harrier. Each would have a practice display on the late May bank holiday Friday or Saturday and then the Show proper on the Sunday and Monday, so 6 Harrier displays each year. The vibration used to blow our sealed double glazed windows.

These scanned photos were taken from our balcony about 25 years ago.

Good point, now engaged brain.