New York, NY —

It's not easy to shock New Yorkers, especially subway riders. But the group Improv Everywhere has been trying for the past seven years, with its "No Pants" Subway ride. Saturday afternoon, more than 15-hundred people participated. In small groups, stop after stop, they trickled onto train cars, wearing only underwear below the waist. WNYC's Jody Avirgan went along for the ride on the 6 train.