Segway's SuperScooter GT2 Megatron LE is a beast of an electric scooter with several modes to get the fastest speeds you've ever felt on a standing mobility device.
Wtf that's like 70km/h. 40 starts to get sketchy even on 26x5 fat tires with suspension. On those tiny little shit pucks the rider will have numb wrists and a real shit time considering literally nowhere has perfect pavement.
With those tiny wheels I imagine this would feel scary as hell. I've been ~45mph on my ebike and that's quite scary even with big wheels. You had better wear a helmet AND a diaper if you're taking this thing up to 43mph on anything but a perfectly paved track. It takes 1 pothole to turn you into a quarter mile long red streak on the pavement.