Straphangers in 60 cities around the world stripped down to their underwear for the 13th annual No Pants Subway Ride Sunday.
Improv Everywhere started the naked tradition in 2002 when seven men ditched their pants on the New York City subway. The event has grown to include more than 4,000 participants in cities from Beijing to Buenos Aires.
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If the January weather or fear of public transportation germs compelled you to stay dressed on the train this weekend, take a look at a few of the brave folks who bared all. There's always next year, fully-clothed subway riders.
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Image: Timothy A. Clary/AFP/Getty Images