According to NBC New York , the construction team was working at 48th Street and Ninth Avenue on a project for the city: tearing up a street to get to a water main. The three-foot blade tore through the adjacent walkway.
"I was on the right side of the sidewalk, suddenly everyone started yelling 'Get down! Move!'" witness Matthew Bisi told NBC New York. "It was just like crazy chaos. People screaming, all the construction workers."
Sean Kuilan was also on the street when the blade came slicing through. "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." He also saw the woman get knocked down by the flying buzzsaw.
"It took her right down, gashes on the side of the thigh," he said. "The force of that coming in was pretty hard."
Police say that the woman was taken to Bellevue Hospital. The security cam footage is appropriately terrifying.