In 2002, the “No Pants Subway Ride” was begun in New York as a stunt. Today, people in as many as 60 countries have begun participating in the now-annual event.
READ: NO PANTS DAY: Public riders in 60 countries strip to underwear
Passengers not wearing pants help a woman with her luggage as they take part in the No Pants Subway Ride in Prague, Czech Republic, Sunday, Jan. 10, 2016. The No Pants Subway Ride began in 2002 in New York as a stunt and has taken place in cities around the world since then. AP
Passengers not wearing pants take part in the No Pants Subway Ride in Prague, Czech Republic, Sunday, Jan. 10, 2016. The No Pants Subway Ride began in 2002 in New York as a stunt and has taken place in cities around the world since then. AP
A participant in the annual ‘No Pants Metro Ride’ walks in the Union Station on Jan., 10, 2016, in Los Angeles. AP
Participants in the annual ‘No Pants Metro Ride’ stand on a Los Angeles Metro train at Union Station on Jan., 10, 2016, in Los Angeles. AP
Participants in the annual ‘No Pants Metro Ride’ dance in the Union Station on Jan., 10, 2016, in Los Angeles. AP
Scotland Beaver, left, and Mathew Spencer in the annual ‘No Pants Metro Ride’ walk in the Union Station on Jan. 10, 2016, in Los Angeles. AP
Participants in the annual ‘No Pants Metro Ride’ enter a Los Angeles Metro train station at Union Station on Jan., 10, 2016, in Los Angeles. AP
A subway rider glances behind him as two women disrobe to their underwear during the 15th annual No Pants Subway Ride Sunday, Jan. 10, 2016, in New York. The group event has been going on since 2002. AP
A police officer stands guard in a Manhattan subway station as three pantless people stroll by during the 15th annual No Pants Subway Ride, Sunday, Jan. 10, 2016, in New York. The group prank, meant to amuse, has been going on since 2002. AP
Riders ignore a pantless and shirtless passenger during the 15th annual No Pants Subway Ride Sunday, Jan. 10, 2016, in New York. Meant to amuse, the group event has been taking place since 2002 in New York. AP
Two people ride a 6 train during the 15th annual No Pants Subway Ride Sunday, Jan. 10, 2016, in New York. The group event, a prank meant to amuse unsuspecting riders, has been going on since 2002. AP
A man in boxer shorts and a woman wearing hosiery with a garter belt wait for a train at a Manhattan train station during the 15th annual No Pants Subway Ride Sunday, Jan. 10, 2016, in New York. The group event, meant as a prank to amuse unsuspecting subway riders, has been going on since 2002. AP
Two men clad in colorful underwear walk up the subway steps during the 15th annual No Pants Subway Ride Sunday, Jan. 10, 2016, in New York. The group event, a prank meant to amuse, has been going on since 2002. AP
Two girls react as people in underpants taking part in the ‘No Pants Subway Ride” event stand next to them in an underground train car in Warsaw, Poland, Sunday, Jan. 10, 2016. The “No Pants Subway Ride” began in 2002 in New York as a stunt and has taken place in cities around the world since then. AP
Youngsters ride on a train as they take part in the No Pants Subway Ride in Bucharest, Romania, Sunday, Jan. 10, 2016. The No Pants Subway Ride began as a stunt in 2002 in New York and has taken place in cities around the world since then. Organizers call it an international celebration of silliness and are organizing it in dozens of cities on Sunday. AP