Rudolf Eb.er (a.k.a. Runzelstirn & Gurgelstock/Wash Your Brains] is an eccentric performer from Switzerland who leads Schimpfluch Gruppe - a group of similarly odd bands/performers/dadaists. He prefers to identify his own work as "psychoacoustic trainings". He is constantly touring with fellow Schimpfluch Gruppe members like Joke Lanz performing absurd actions, which often lead to riots and subsequent ban of Gruppe in certain countries.