It's that special time of year again when Charlie Todd and a troupe of others that like to de-pants every January go underground for a nice, brisk ride on the subway. As usual, you're all invited (warning: you may be arrested), but if you show up you must not have pants on! They warn, in all caps, that "THIS IS A PARTICIPATORY EVENT. DO NOT SHOW UP UNLESS YOU PLAN TO TAKE YOUR PANTS......