It's that time of year again. When subway riders take off their pants and ride subways around the globe.
Why? Because fucking crazy.
Subway riders stripped down to their underwear on Sunday for the annual No Pants Subway Ride.
Yeah, it's an official "thing."
The event, organized by the Improv Everywhere comedy collective, started in 2002 in New York with seven participants.
"We want to give New Yorkers a reason to look up from their papers, from their phones, and experience something that's a little different than their average run-of-the-mill stuff," said Jesse Good, one of the event's organizers.
Pants-less subway rides were scheduled to take place this year in dozens of cities around the world, including in Boston; Berlin; Prague; London; and Warsaw, Poland, organizers said. (Check out what Europeans wear under their pants.) Philadelphia's version was sponsored by a laundry delivery service, which asked participants to show up with extra pants or other clothing to donate to charity.
Participants are told to get on trains and act as they normally would and are given an assigned point to take off their pants. They're asked to keep a straight face and respond matter-of-factly to anyone who asks them if they're cold.
Here's some of yesterday's riders, captured for posterity. (See what we did there?)
Steven Blomquist of Somerville, Mass., wears no pants while riding a subway train during the "No Pants Subway Ride" on Sunday in Boston. (AP/Steven Senne)
A passerby glances at two pantless women waiting on the platform for a train at Brooklyn's Jay Street/MetroTech station during the 16th annual No Pants Subway Ride in New York. (AP Photo/Kathy Willens)
Two men react as a woman puts her boots back on after removing her pants during the annual No Pants Subway Ride in New York. (AP Photo/Kathy Willens)
Steven Blomquist of Somerville, Mass., (center) talks with Tim Lewis of Boston during the No Pants Subway Ride on Sunday in Boston. (AP Photo/Steven Senne)
Three men pose in their underwear in front of a Union Square subway station sign during the 16th annual No Pants Subway Ride in New York. (AP Photo/Kathy Willens)
No Pants Subway Riders pose for photographs in their skivvies on Sunday in New York (AP Photo/Kathy Willens)
Participants in the 16th annual No Pants Subway Ride go pantless on the R train to Manhattan on Sunday. (AP Photo/Kathy Willens)
Participants in the 16th annual No Pants Subway Ride ride the R train pantless on Sunday in New York. (AP Photo/Kathy Willens)
And ... now some video. In case photos weren't enough.