Another famous prank just before Yippie was coined was a guerrilla theater event in New York City on August 24, 1967. Abbie Hoffman and a group of future Yippies managed to get into a tour of the New York Stock Exchange, where they threw fistfuls of real and fake US$ from the balcony of the visitors' gallery down to the traders below, some of whom booed, while others began to scramble frantically to grab the money as fast as they could. The visitors' gallery was closed until a glass barrier could be installed, to prevent similar incidents.