There are so many questions this event begs, but I'll ask the most obvious. Where do you put your clipper card when you aren't wearing pants?

San Francisco's No Pants Subway Ride, part of “an international celebration of silliness” that started in 2002, occurred on Sunday. PhotographerBhautik Joshi once again snapped up some choice photos of the action.

If you missed it, well here you go. And if you think this is the weirdest thing you've seen on BART, you haven't ridden BART enough.