As a conscientious objector I did my community service in 1971 in a psychiatric hospital and a friend there, who also was a guitar player, invited me one day to join him recording film music with a band named Kraftwerk which I didn't know at the time. I came along and jammed at this session together with Ralf Hütter and a drummer (I believe his name was Charly Weiß). Florian Schneider and Klaus Dinger were present as listeners and everybody liked the spontaneous music we did together.