Photo by Heath Robson via Mule.net

Gov’t Mule are currently in the midst of a European tour. On Sunday night. the quartet performed at North Rhine-Westphalia, Germany’s Kunst!Rasen, Bonn. Deep Purple were also on the bill and, during their set, Warren Haynes emerged to play on an extended jam as well as the anthem “Smoke On The Water.” Haynes has performed with Deep Purple while in Europe, including a memorable 2009 collaboration. Longtime Deep Purple bassist Robert Glover also appears on the Mule albums The Deep End and The Deepest End. Gov’t Mule will perform at Torgau, Germany’ Kulturbastion today.