Jan. 14 (UPI) -- Hundreds of commuters in two dozen cities around the world dropped their trousers for the annual Global No Pants Subway Ride.
The No Pants Subway Ride, which began in 2002 as a stunt by "prank collective" Improv Everywhere, was held Sunday in cities including London, Copenhagen, Buenos Aires, Chicago, San Francisco and Berlin.
The flagship event in New York saw dozens of people braving 32-degree weather to ride the subway in their underwear.
"There is no agenda for the event apart from a desire to make others laugh and smile," Improv Everywhere said on its website. "Improv Everywhere founder Charlie Todd refers to the event as a 'celebration of silliness.'"