Watch a slideshow of Sunday at Bumbershoot, featuring Shim. Photo by Chris Kornelis.ShimWhen: 2 p.m.ishWhere: EMP’s SkyChurchShim makes a great first impression. Once you stop drooling over Mike Notter’s gorgeous mutton chops (bravo), you’re treated to an onslaught of punchy riffs and harmonies on which this house (EMP) was built. You’ve heard them all before, just never from Shim.