Watch Sadisflix. Jürgen Leppert, also known as "Der Dreher" or "der Kreisel" is a graduate engineer, speaker inventor, 360 degree dancer, gifted Frisbee player and thoroughbred 68er. Everything revolves around the Karlsruher legend, and not just on the dance floor. A declaration of love to music, dancing and rebellion. A portrait of a tough person who still swims against the stream and the living proof that 81 years is far from too old for hard raves.