Tens of thousands of people in 60 cities around the world celebrated the 15th annual "No Pants Subway Ride" riding the subway pantless.
The yearly prank was originally started by Improv Everywhere in New York City. This year on January 11 people in more than 60 cities in over 25 countries took part.
"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," Improv Everywhere explained on their website.