In October 2007, Michel Herr was invited to participate in the shooting of a documentary movie by US film director Erin Harper, titled "Passion", a portrait of the late Polish jazz violin player Zbigniew Seifert. For the occasion he met with his colleagues of the Zbigniew Seifert Variospheres Quartet (1976, see photo), the Swiss bassist Hans Hartmann and the Polish drummer Janusz Stefanski. They got interviewed and played together again for this occasion. Michel Herr (piano), Hans Hartmann (stick) and Janusz Stefanski (drums). Frankfurt (D), October 29, 2007. Screen grabs from the movie "Passion" by Erin Harper.