Think stepping in dog poo is the worst thing that could happen to you walking down the street? Then you're in for a rude awakening.

This video, taken in Manhattan, New York shows a circular buzz saw shooting off a piece of construction equipment and hitting a nearby pedestrian. The construction workers were busy repairing water pipes when the the saw malfunctioned and the blade came loose.

It flew over 100 feet before bouncing off a tree and striking an unlucky woman, who was treated in a nearby hospital for a gashed leg.

A witness, speaking to NBC News, described the terrifying scene: "I hear the blade and see the blade literally coming off the machine," he said. "It was huge. It looked like it was from a horror flick. I couldn't believe it."