In my line of work the most deadly piece of equipment is an open microphone. In the world of construction there are a lot pieces of equipment that can end your career quickly. This is the case of a runaway concrete buffer. The buffer is the thing that looks like a floor sweeper. Its job is to smooth out the freshly poured concrete and provide a nice finish.

This concrete buffer has escaped from its operator and is now spinning on its own across a freshly poured slab of concrete. I don't know what is funnier the feeble attempts of the construction crew to stop the machine or the comments from the photographer.