What? When? Exactly. The band was apparently swinging through STL after a tour stop in KY, and at the last minute decided to do an impromptu “guerilla style” acoustic show sitting on the ground under the Arch last night. The only people that knew about it were their Twitter followers. They saw the Tweet and showed up not knowing what to expect. A pleasant surprise for the Twitterers, the band was playing just a few feet away completely raw and unplugged. How cool!