Slagsvold has also played with the rock band «Motorpsycho» from Trondheim, the pop trio «Skrujern», started in 1994, and within «Norsk Utflukt» where he primarily played the piano and bass, with the author Lars Saabye Christensen as vokalist.
In 1989 Ryan and bassist Bent Sæther together with drummer Killer Mike (b. Kjell Runar Jenssen), formed Motorpsycho as an alternative metal band that very soon developed into a unique blend of heavy metal, grunge and indierock, as well as exploring the sonic noise experiments that is associated with the Associate Member Deathprod.
Motorpsycho presents The International Tussler Society is an album by The International Tussler Society.