No pants subway ride

Similar rides and events also took place around the world. The mission started as a small prank with seven guys and has grown into an international celebration of silliness, with dozens of cities around the world participating each year.

As the event's website puts it: "The idea behind the No Pants Subway Ride is simple: Random passengers board a subway car at separate stops in the middle of winter without pants. The participants behave as if they do not know each other, and they all wear winter coats, hats, scarves, and gloves. The only unusual thing is their lack of pants."