Police are hunting a man who video shows pepper sprayed a couple in a random unprovoked attack as they walked in Manhattan, in the latest in a spate of incidents that have driven up crime in New York. Surveillance video shows the couple - an 18-year-old woman and her 19-year-old male partner - walking down 8th avenue in the trendy Chelsea neighborhood. A man walks towards them and as he passes he quickly raises a can to their eyes.