The 12th annual No Pants Subway Ride went down yesterday. San Francisco celebrated the event with a midday BART ride. After a jaunt across town on the BART, hundreds of pants-less riders poured out of the Montgomery St. and Civic Center stations to shiver in their skivvies.

The 12th annual No Pants Subway Ride went down yesterday. San Francisco celebrated the event with a midday BART ride. After a jaunt across town on the BART, hundreds of pants-less riders poured out of the Montgomery St. and Civic Center stations to shiver in their skivvies.