The 10th Annual No Pants Subway Ride took place on Sunday, January 9, 2011, with 3,500 participants in New York City and thousands more in 50 cities across the world. The event is organized by Improv Everywhere, and involves participants who strip down to their underwear as they go about their normal routine. Above and below, photos from NYC and elsewhere.
Participants in Zurich ride a tram, sans culottes. (REUTERS/Christian Hartmann)
No Pants Subway Ride participants walk through the hallway of the Union Square subway station in New York City. (REUTERS/Jessica Rinaldi)
People who took part in the 10th Annual No Pants Subway Ride do handstands in the window of a Filene's Basement department store overlooking New York's Union Square January 9, 2011. (REUTERS/Jessica Rinaldi )
A dog looks on as people wait to ride a tram without pants through the streets of Zurich on the day of the 10th Annual New York City No Pants Subway Ride January 9, 2011. (REUTERS/Christian Hartmann)
A man in his underwear takes part in the 10th Annual No Pants Subway Ride in New York City January 9, 2011. (REUTERS/Jessica Rinaldi)
Pantsless subway buskers, New York City. (REUTERS/Jessica Rinaldi)
People who took part in the 10th Annual No Pants Subway Ride dance in a window of a department store in New York City January 9, 2011. (REUTERS/Jessica Rinaldi)
A man talks on his cell phone after taking part in the 10th Annual No Pants Subway Ride in New York City January 9, 2011. (REUTERS/Jessica Rinaldi)
More photos and videos on Improv Everywhere's website.