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Annual "No Pants" Subway Ride Takes Place On NYC's Subways

NEW YORK, NY - JANUARY 08: Participants gather in the Union Square subway station during the annual No Pants Subway Ride on January 8, 2012 in New York City. The annual event is staged by the group Improv Everywhere which encourages people in dozens of cities worldwide to discard their pants while riding the subway. (Photo by Mario Tama/Getty Images)

Flashmob Mexico's "A Day Without Pants"

Mexico City residents take part in the "A Day Without Pants" event at the subway in Mexico City, Sunday, January 8, 2012.