Chicago, Illinois, United States of America.
Various shots of a man carrying a woman on his shoulder as he makes his way gingerly along a plank that is sticking out of a window on the 19th floor of a building. Vertigo-inducing view from above shows the sheer drop below - yikes!
Commentator explains the couple are doing a slowed-down version of the Big Apple (dance craze of the day). The woman puts her legs around the man's waist and leans backwards while he turns around on a small circular board on the end of the plank.