Flash Mobs, UFO Watchtower, Dark Tip: Total PC Destruction

You're sitting in front of Starbucks enjoying a venti caramel macciato with soy milk (Martin's favorite), and out of nowhere a group of people show up, chant a ridiculous phrase, and then flee. Did the indie rocker who sold you your beverage slip something in your cup? No. It's just a new worldwide fad. These harmless gatherings are called flash mobs. Tonight, Tom Grow, chief instigation officer of MobProject.com, sheds some light on flash mobs. Also on the program, D-Tip shows you how to rid your PC of all incriminating files in a matter of seconds. And alien seeker Judy Messoline talks about why she has erected a UFO watchtower in the middle of Colorado. Plus, another sex kitten from our Girls Gone Wired gallery.