Ruf was cast by German music television station Viva II in 1998 for the TV show Kamikaze, which he hosted and produced.
[3] In 2002, Ruf started a hidden camera show, Dumm erwischt, in which people on the street had tricks played on them.
[6] Ruf appeared in the films Charley's Tante (1996), Und alles wegen Mama (1998) and Wie die Karnickel (2002).
In 2000, Ruf and German DJ WestBam covered Abwärts' song "Computerstaat" for the compilation Pop 2000.
In June 2001, Ruf came under attack by the public when a report circulated alleging that he had made insensitive jokes about a colleague's skin cancer diagnosis.
[8] After making an insensitive tweet about German jazz/pop musician Roger Cicero's death in March 2016, Ruf was heavily criticized in the media.