There is a collector of "Concept Cars" in the US in Wisconsin by the name of Joe Bortz.
I was talking with him once at a car event and we were discussing a contraption I had made (photographic). The conversation then turned to a contraption he said he had originally created for use in a large empty area of a Restaurant he owned: The Motorized Bar Stool.
Apparently patrons would race these around in a circle. I had never heard of this feature in a Restaurant and I don't think that place is in business anymore, but it would appear that just about everyone in Wisconsin has a motorized bar stool these days.....
Some of them get built with quite a bit of torque and since many of the "drivers" are "rather large", center of gravity becomes WAY too high for decent acceleration to occur and the driver is promptly flipped over backwards when they hit the gas.
that is why they are also sold with "wheelie bars". A popular bolt-on accessory.
