Saturday is the annual Amtrak Mooning Day in Orange County, CA. This is as tastefully done as possible

, but hysterically bizarre. The trains run all day with sold-out capacity, passengers come from all over the area to view the scenery and have their cheeks ache from smiling!
If you're in the area, get your butt on a train (or at least
near one)!
http://www.moonamtrak.org/