Join hundreds of people from SF who like to ride the subway (BART & MUNI) without pants. Wear colorful and festive underwears & socks. The point is to keep a straight face during the entire ride. Bring money for the train. Wear normal clothes on top & act completely normal as if nothing is missing from your bottom half. Do not tell people that this is a type of coordinated event. Be friendly, nice & normal. This event takes place in over 15 countries around the world. RSVP at: https://www.facebook.com/events/1491288427843410/ - Photo courtesy of SFFunCheap.