In 1999, Act big band played during the evening "100 years of jazz in Wallonia", at the Forum in Liège. Sadi made a surprise appearance, conducting the band in a few of his compositions. Sadi (conductor), John Ruocco (tenor sax), Félix Simtaine (drums, leader), Fabrice Alleman (alto sax), Ben Sluijs (alto sax), Kurt Van Herck (tenor sax), Paul Bourdiaudhy (trombone), Marc Godfroid (trombone). Although he is not visible on this photo, Michel Herr was of course present (piano, musical director). Forum, Liège (B), September 11, 1999.