They stampeded from EMA’s set. In previous years it wasn’t until Saturday that the Blue Stage, a.k.a. the stage for “less-known” acts, turned into such a madhouse. But before Merrill Garbus was even finished soundchecking, the face-painted crowd was already going nuts. It looked like somebody put the Indigo Girls fanbase in a blender with a Ziggy Stardust concert. Meanwhile, Battles have a crazy keyboard set-up.