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