It’s actually pretty simple and old school tech. INside of the pole holding the fans it has a pattern that when getting hot expands. Together with gravity in now starts spinning and with every spin it starts going faster.

Majority counts I suppose. Would be interesting to see if it is different per state though.

Nono, don’t allow them to have more speed. It doesn’t seem you understand Dutch roads if you dat that. It will cause a lot more accidents.

Putting a license plate on it however will make it a lot easier to track stuff. And while we are on it make helmets compulsory. Then the convenience is gone and not as cool anymore.