Fortunately, nobody was injured in this wild adventure. During construction of a facility, the concrete crew lost control of a gas-powered concrete polisher, and neighbors looking on captured the fairly dangerous but equally hilarious scene on video.
Normally, the polisher’s handlebars are held by a worker who sort of floats the spinning polisher at the bottom of the machine over the freshly-poured surface of the concrete to create a smooth texture. In this case, the polishing disc is stationary, but the rest of the machine is spinning around. Sort of like the tail wagging the dog.
It is more difficult to describe the action than just show it. Without further ado, I present the adventure of the rogue concrete polisher: