It's a cold day to drop trou on the subway.
Temperatures reached about 32 degrees on Sunday afternoon for the 19th annual "No Pants Subway Ride," in which pranksters ride the subway in their skivvies in a citywide practical joke.
Nearly 900 people said they would participate in the ride, which started at 3 p.m. and was organized by Improv Everywhere. More than 5,000 said they were interested in the event.
The pantsless prank has now spread to cities worldwide, from Calgary to Prague.