Passengers around the world commute in their underwear for the No Pants Subway Ride

On Sunday, commuters around the globe stripped down to their skivvies for the 11th Annual No Pants Subway Ride. 

The pants-less prank was started in 2002 by Improv Everywhere, a New York-based collective that dedicates itself to causing "scenes of chaos and joy in public places." Seven men involved with the collective rode the subway without pants, pretended not to know each other, and captured the stunt on a hidden camera.

The event has since spread to cities all over the world, including London, Toronto, Mexico City and Tel Aviv, CNN reported. 

The only requirements to join in on the fun? Ditch your bottom half, show off your underwear, and act nonchalant on your commute. Participants talked on their phones, read, chatted with friends, and behaved naturally around unsuspecting commuters. 

“It’s about making people laugh,” Cole Banning the creative director of Improv in Toronto, told The Toronto Star. “The world needs more people just having fun.”

More than 6,600 participants responded to the event's Facebook group in New York. Over 16,000 people registered to participate worldwide, The Mirror reported.

Improv Everywhere has also been responsible for pranks such as sending hundreds of participants to the beach in formal wear and flooding a Best Buy store with members dressed exactly like the staff, CNN reported. 

Did you participate this year? Were you a victim of the pranksters? Let us know in the comments.