Cologne's own sonic physician Dr Donk has been injecting the Hard Dance scene with high-octane, genre-bending beats - from uptempo and zaagstep to dubstep-tinged chaos that keeps crowds jumping. After selling out Bootshaus, rocking Tomorrowland, Defqon.1 and Decibel Outdoor and launching his own label "Clinic Recordings" with 21 fresh tracks, he's the doctor prescribing pure rave therapy.