Photos: Commuters drop their pants for annual No Pants Subway Ride

[caption id="attachment_1336531" align="alignleft" width="940"] People taking part in the No Pants Subway Ride board the uptown 6 train in New York January 13, 2013. The event is an annual flash mob and occurs in different cities around the world, according to its organisers. REUTERS[/caption] [caption id="attachment_1336533" align="alignleft" width="940"] A man takes off his pants next to passengers at an underground platform during the "No Pants Subway Ride" in Mexico City January 12, 2014. The event is an annual flash mob and occurs in different cities around the world in January, according to its organizers. REUTERS[/caption] [caption id="attachment_1336535" align="alignleft" width="940"] Passengers with no pants exit a subway station during the "No Pants Subway Ride" event in Warsaw January 12, 2014. The event involves participants who strip down to their underwear as they go about their normal routine, and occurs in different cities around the world in January, according to its organisers. REUTERS[/caption] [caption id="attachment_1336537" align="alignleft" width="940"] A woman without pants waits on a subway platform during the "No Pants Subway Ride" in Chicago, Illinois, January 12, 2014. The event is an annual flash mob and occurs in different cities around the world, according to its organisers. REUTERS[/caption] [caption id="attachment_1336539" align="alignleft" width="940"] A man without pants and wearing a mask sits in a subway train during the "No Pants Subway Ride" in Mexico City January 12, 2014. The event is an annual flash mob and occurs in different cities around the world in January, according to its organizers. REUTERS[/caption] [caption id="attachment_1336541" align="alignleft" width="940"] Passengers without their pants use a subway train during the "No Pants Subway Ride" in Berlin January 12, 2014. The event is an annual flash mob and occurs in different cities around the world, according to its organisers. REUTERS[/caption] [caption id="attachment_1336543" align="alignleft" width="940"] A woman without pants takes part in the "No Pants Subway Ride" in Chicago, Illinois, January 12, 2014. The event is an annual flash mob and occurs in different cities around the world, according to its organizers. REUTERS[/caption] [caption id="attachment_1336545" align="alignleft" width="940"] Passengers without their pants wait on a underground platform during the "No Pants Subway Ride" in Vienna January 12, 2014. The event involves participants who strip down to their underwear as they go about their normal routine, and occurs in different cities around the world in January, according to its organisers. REUTERS[/caption] [caption id="attachment_1336547" align="alignleft" width="940"] Passengers without pants ride a train during the "No Pants Subway Ride" in Chicago, Illinois, January 12, 2014. The event is an annual flash mob and occurs in different cities around the world, according to its organizers. REUTERS[/caption] [caption id="attachment_1336549" align="alignleft" width="940"] A woman takes a photograph of a group of people standing in the subway with no pants on during the annual "No Pants Subway Ride" in New York City January 8, 2012. The event organized by Improv Everywhere involves participants who strip down to their underwear as they go about their normal routine. REUTERS[/caption] [caption id="attachment_1336551" align="alignleft" width="940"] Passengers without their pants wait on a underground platform during the "No Pants Subway Ride" in Vienna January 12, 2014. The event involves participants who strip down to their underwear as they go about their normal routine, and occurs in different cities around the world in January, according to its organisers. REUTERS[/caption] [caption id="attachment_1336555" align="alignleft" width="940"] A man takes part in the annual No Pants Subway Ride in New York January 12, 2014. REUTERS[/caption]