Of Tucson's two dozen comedy shows every month, The Switch regularly smashes expectations. That's because the audience includes the whole Twitter-verse, a realm thick with muck and random madness. For a comedian, every Switch outing is a walk off the plank. They get their own short sets, but also take their chances in loopy debates and then plunge into the nether-world of trolls, each charged with riffing on tweets sure to inspire hilarity.