Participants of the No Pants Subway Ride By Odlo ride a commuter train on January 7, 2018 in Berlin, Germany. The annual event, in which participants board a subway car in January while not wearing any pants, began as a joke by the public prank group Improv Everywhere in New York City. This year's No Pants Subway Ride was organized by the sportswear company Odlo. (Photo by Carsten Koall/Getty Images)
