Terrifying video of pair performing precarious stunts atop skyscraper. <br /> <br />Heartstopping moment a young woman dangles from the edge of a skycraper as her boyfriend clings onto one arm - before she performs somersaults <br /> <br />A woman and man were seen on top of a skyscraper in China <br />Footage shows the woman hold onto the man as she hangs off the edge <br />They perform a series precarious stunts including jumping on the gangway
