Riding Mower + Hovercraft + Trowel = Riding Trowel (of course)
Except for the part about ramming into each other, the three contraptions pictured above look — and move — a lot like bumper cars.
In fact, the devices (called “ride-on power trowels”) can cost up to $40k apiece, and are used in commercial construction to smooth freshly-poured cement (“concrete” once it’s dry).
They’re working on “Aurora on France Senior Living,” a new building going up at 6500 France in Edina.
P.S.: And yeah, they look like a lot of fun to operate.