One issue I've noticed with these new forms of electric wheeled transport (longboard, transverse and longitudinal one-wheelers) is that the people riding them often don't come from a sports background. They aren't "safe" devices exactly - it takes skill to pilot them, and when things inevitably go awry, it takes good reflexes to avoid damage.

Novices to action sports often throw their arms out to catch themselves when they bail instead of rolling through the fall. They also don't know how to navigate obstacles via strategic weighting and unweighting of their implement.

The energies involved are also substantial -- to put it bluntly, some of these things fuckin' rip, which is super fun, but also makes safety gear a good idea. You can take a lot of trauma and abrasion bailing at 25mph+, potentially life-changing or fatal in the worst cases. There's a reason why downhill longboarders and an increasing number of electric wheel riders wear a fullface and leathers.