Participants in the "No Pants Subway Ride" stand on a New York City subway train January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
A participant in the "No Pants Subway Ride" stands on a New York City subway platform January 10, 2016 in New York. ( TIMOTHY A. CLARY/AFP/Getty Images)
An infant sleeps in a crib during the "No Pants Subway Ride" on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
A participant in the "No Pants Subway Ride" stands on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
Participants in the "No Pants Subway Ride" walk on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
Participants in the "No Pants Subway Ride" stand on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
Participants in the "No Pants Subway Ride" walk on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
A participant in the "No Pants Subway Ride" stands on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
A participant in the "No Pants Subway Ride" stands on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
A participant in the "No Pants Subway Ride" poses on a New York City subway platform January 10, 2016 in New York. (TIMOTHY A. CLARY/AFP/Getty Images)
Passengers without arrive at Prague's subway during the "No Pants Subway Ride" on January 10, 2016 in Prague. ( MICHAL CIZEK/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" walk through Paddington mainline railway station in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Men without pants wait for a train at the subway station in Hamburg, northern Germany during the "No Pants Subway Ride" on January 10, 2016.
(BODO MARKS/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" travel on a London underground train in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" wait at a station for a London underground train in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" travel on a London underground train in London, on January 10, 2016. (Photo credit should read LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" walk in the London underground in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" travel on a London underground train in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" waits for a London underground train in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
Participants in the annual International "No Pants Subway Ride" arrive at a train station in London, on January 10, 2016. (LEON NEAL/AFP/Getty Images)
People taking part in the annual international "No Pants Subway Ride" day travel on the Jerusalem light train on January 10, 2016.
(MENAHEM KAHANA/AFP/Getty Images)
People taking part in the annual international "No Pants Subway Ride" day travel on the Jerusalem light train on January 10, 2016.
(MENAHEM KAHANA/AFP/Getty Images)
People taking part in the annual international "No Pants Subway Ride" day wait for the Jerusalem light train on January 10, 2016.
(MENAHEM KAHANA/AFP/Getty Images)