Ellos salieron sin pantalones al metro

A rider waits for a train in the New York subway in her underwear as she takes part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

A man (L) watches people taking part in the "No Pants Subway Ride" on the U2 Subway line in Berlin on January 12, 2014 . "No Pants Subway Ride", is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. In the UK, where the word pants refers to underwear, the event has been translated as "No Trousers". AFP PHOTO / ODD ANDERSEN

Participants of the "No Pants Subway Ride" stand on the platform at the Potsdamer Platz station waiting for the U2 Subway line in Berlin on January 12, 2014 . "No Pants Subway Ride", is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. In the UK, where the word pants refers to underwear, the event has been translated as "No Trousers". AFP PHOTO / ODD ANDERSEN

People taking part in the "No Pants Subway Ride" exit a train on the U2 Subway line in Berlin on January 12, 2014. "No Pants Subway Ride", is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. In the UK, where the word pants refers to underwear, the event has been translated as "No Trousers". AFP PHOTO / ODD ANDERSEN

Participants in the 13th annual International "No Pants Subway Ride" travel on a London underground train in London, on January 12, 2014. Started in 2002 with only seven participants, the day is now marked in over 60 cities around the world. The idea behind "No Pants" is that random passengers board a subway car at separate stops in the middle of winter, without wearing trousers. The participants wear all of the usual winter clothing on their top half such as hats, scarves and gloves and do not acknowledge each other's similar state of undress. AFP PHOTO/LEON NEAL

Participants in the13th annual International "No Pants Subway Ride" pose for a picture at Paddington underground station in London, on January 12, 2014. Started in 2002 with only seven participants, the day is now marked in over 60 cities around the world. The idea behind "No Pants" is that random passengers board a subway car at separate stops in the middle of winter, without wearing trousers. The participants wear all of the usual winter clothing on their top half such as hats, scarves and gloves and do not acknowledge each other's similar state of undress. AFP PHOTO/LEON NEAL

Participants take part in the "No Pants Subway Ride" in Hong Kong on January 12, 2014. Commuters in Hong Kong and Beijing braved public transport without trousers in the stunt, also celebrated in Australia's major cities, which has gone global since its first staging by the US group Improv Everywhere in New York in 2002. AFP PHOTO / Philippe Lopez

People take part in a 'No Pants Subway Ride' event in Beijing on January 12, 2014. Commuters in Hong Kong and Beijing braved public transport without trousers in the stunt, also celebrated in Australia's major cities, which has gone global since its first staging by the US group Improv Everywhere in New York in 2002. AFP PHOTO / WANG ZHAO

People taking part in the "No Pants Subway Ride" wait at a metro station in Mexico City on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants on January. The event is observed in dozens of cities worldwide. AFP PHOTO/ANTONIO NAVA

People taking part in the "No Pants Subway Ride" wait at a metro station in Mexico City on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants on January. The event is observed in dozens of cities worldwide. AFP PHOTO/ANTONIO NAVA

People taking part in the "No Pants Subway Ride" remain on a metro train in Buenos Aires on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO / Alejandro PAGNI

People taking part in the "No Pants Subway Ride" wait at a metro station in Buenos Aires on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO / Alejandro PAGNI

People taking part in the "No Pants Subway Ride" wait at a metro station in Buenos Aires on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO / Alejandro PAGNI

A couple taking part in the "No Pants Subway Ride" remains on a metro train in Buenos Aires on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO / Alejandro PAGNI

People in underwear wait in a train at the Kiev subway as they take part in the 2014 No Pants Subway Ride on January 12, 2014. 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/ VASILY MAXIMOV

People in underwear stand near a subway station in Paris after taking part in the 2014 No Pants Subway Ride on January 12, 2014 in Paris. 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 / JACQUES DEMARTHON

TOPSHOTS People take part in a 'No Pants Subway Ride' event in Beijing on January 12, 2014. Commuters in Hong Kong and Beijing braved public transport without trousers in the stunt, also celebrated in Australia's major cities, which has gone global since its first staging by the US group Improv Everywhere in New York in 2002. AFP PHOTO / WANG ZHAO

A dog looks on as participants in the 13th annual International "No Pants Subway Ride" travel on a London underground train in London, on January 12, 2014. Started in 2002 with only seven participants, the day is now marked in over 60 cities around the world. The idea behind "No Pants" is that random passengers board a subway car at separate stops in the middle of winter, without wearing trousers. The participants wear all of the usual winter clothing on their top half such as hats, scarves and gloves and do not acknowledge each other's similar state of undress. AFP PHOTO/LEON NEAL

People taking part in the "No Pants Subway Ride" ride a metro train in Washington on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO/Nicholas KAMM

People taking part in the "No Pants Subway Ride" walk in a metro station n in Washington on January 12, 2014. "No Pants Subway Ride" is an annual event in which transit passengers ride trains without wearing pants in January. The event is observed in dozens of cities worldwide. AFP PHOTO/Nicholas KAMM

Some riders enter the New York subway in their underwear as they take part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

A woman rides a New York subway train in her underwear as she takes part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

A woman rides a New York subway train in her underwear as she takes part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

Riders joke as they wait for a train in the New York subway in their underwear while taking part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

Riders wait for a train in the New York subway in their underwear as they take part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

Police look on as riders wait for a train in the New York subway in their underwear as they take part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

A rider waits for a train in the New York subway in her underwear as she takes part in the 2014 No Pants Subway Ride on January 12, 2014. 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 CLARY

A rider in the New York City subway in the underwear as she takes part in the 2014 No Pants Subway Ride January 12, 2014. 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 CLARY

Two riders in the New York City subway in the underwear as they take part in the 2014 No Pants Subway Ride January 12, 2014. 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 CLARY