|Charles Mostoller1/14 |Charles Mostoller
|Charles Mostoller2/14 |Charles Mostoller
|Charles Mostoller3/14 |Charles Mostoller
|Charles Mostoller4/14 |Charles Mostoller
|Charles Mostoller5/14 |Charles Mostoller
|Charles Mostoller6/14 |Charles Mostoller
|Charles Mostoller7/14 |Charles Mostoller
|Charles Mostoller8/14 |Charles Mostoller
|Charles Mostoller9/14 |Charles Mostoller
|Charles Mostoller10/14 |Charles Mostoller
|Charles Mostoller11/14 |Charles Mostoller
|Charles Mostoller12/14 |Charles Mostoller
|Charles Mostoller13/14 |Charles Mostoller
|Charles Mostoller14/14 |Charles Mostoller
Move over, People of SEPTA.
On Sunday, dozens of brave Philadelphians took to the Broad Street line in coats, boots and scarves – and their polka-dot undies. With temperatures dipping into the teens, these folks must've been shivering!
Thirty-one cities across the globe participated in the prank, which began nearly two decades ago in New York City by Improv Everywhere.
- PHOTOS: Blues dump Bruins to win Stanley Cup after agonizing 52-year wait40 Pictures
- PHOTOS: This Pakistani waiter looks just like Peter Dinklage8 Pictures
This year's ride in Philly was organized by Got Laundry, a pick-up laundry service that operates in the city and surrounding suburbs. It asks participants to bring another pair of pants or other piece of clothing to donate to local shelters before boarding the train.
Check out more photos of these scantily-clad straphangers in Boston.