Sin pantalones en Nueva York y México

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

NEW YORK, NY – JANUARY 13: A pantless woman stands on a subway platform on January 13, 2013 in New York City. Thousands of people participated in the 12th annual No Pants Subway Ride, organized by New York City prank collective Improv Everywhere. During the afternoon winter event, participants boarded separate subway stops and removed their pants, pretending that they did not know each other. The event, refered to as a "celebration of silliness" is designed to make fellow subway riders laugh and smile. John Moore/Getty Images/AFP

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

Some riders in the New York City subway in the underwear as the take part in the 2013 No Pants Subway Ride January 13, 2013. Started by Improv Everywhere, the goal is for riders to get on the subway train dressed in normal winter clothes (without pants) and keep a straight face. AFP PHOTO / TIMOTHY A. CLARY

A young man waits to board a train at a subway station during the worldwide 'No Pants Subway Ride' event in Mexico City on January 13, 2013. The 'No Pants Subway Ride', though in its 12th year, still surprises fellow passengers on public transit, and is spreading to other cities across the globe. AFP PHOTO/RONALDO SCHEMIDT

People walk through a subway station during the worldwide 'No Pants Subway Ride' event in Mexico City on January 13, 2013. The 'No Pants Subway Ride', though in its 12th year, still surprises fellow passengers on public transit, and is spreading to other cities across the globe. AFP PHOTO/RONALDO SCHEMIDT

People wait for the train at a subway station during the worldwide 'No Pants Subway Ride' event in Mexico City on January 13, 2013. The 'No Pants Subway Ride', though in its 12th year, still surprises fellow passengers on public transit, and is spreading to other cities across the globe. AFP PHOTO/RONALDO SCHEMIDT

People ride a subway train during the worldwide 'No Pants Subway Ride' event in Mexico City on January 13, 2013. The 'No Pants Subway Ride', though in its 12th year, still surprises fellow passengers on public transit, and is spreading to other cities across the globe. AFP PHOTO/RONALDO SCHEMIDT