Do self-balancing electric unicycles count? They are a lot like self-balancing electric scooters, but with one larger wheel between your legs. The big advantage

Do self-balancing electric unicycles count? They are a lot like self-balancing electric scooters, but with one larger wheel between your legs. The big advantage of them is better transportability: when you fold the footrests, they are compact enough that you can treat them like a chunky hardshell briefcase.