Are there any of those electric unicycles/monowheels, but with a battery that is not prone to incinerating everything in it's radius? Either LiFePO4, or a removable pack, or something similar. I'm often considering them because of distance, size and weight, comfort of a large diameter wheel and apparent safety (when driven at safe speed). But the thermal runaway failure mode is so scary that i dont even.
A nice video of battery pack failure: https://youtu.be/8h41p13e4TU?t=608