If it's true what they say -- that one person's trash is another person's treasure -- then Barista Rob and Robin stumbled across a veritable goldmine last night at 7th and Montana. Rumor has it that they were trying to enjoy a quiet cup of coffee at Our Favorite Starbucks when a couple of Beer-Guzzling Interlopers crashed the party. Inexplicably, one of the Interlopers introduced himself by saying, "I'm from Wisconsin ... and I'm very gassy." According to Rob, the Interlopers were forced to leave and clean up their mess ... but their memory lingers on. By the time I arrived this morning, their trash -- including more than a dozen beer cans -- was still on the scene.