Sivertsen has produced and animated a number of short animations since the early 1980s and since 1990 in his own company AnimaThorFilm. He has his work base in Nord-Trøndelag, where he works with advertising and short films, both digital and analogue. Zwish! is a character animation that also represented a timely celebration of the animated film inevitably not only synonymous with 'children's film'.
The film portrays a fictional nuclear war between NATO forces and the Warsaw Pact that rapidly escalates into a full scale exchange between the United States and the Soviet Union, focusing on the residents of Lawrence, Kansas, and Kansas City, Missouri, as well as several family farms situated next to nearby nuclear missile silos.
God throws his hands up at the foolishness of humanity and orders the race destroyed. A trio of bleeding-heart angels strike a deal with him: if they can find just two good souls, the Lord will allow Earth to survive.
Aiming to defeat the Man of Steel, wealthy executive Ross Webster hires bumbling but brilliant Gus Gorman to develop synthetic kryptonite, which yields some unexpected psychological effects in the third installment of the 1980s Superman franchise.
Based on the real-life Richard Speck murders, amoral, nearly psychotic killer Warren Stacey (Gene Davis) is a serial killer who has murdered a number of women; he stabs them while they are naked to minimize leaving any physical evidence.