 In his 1999 documentary "My Best Fiend", frequent collaborator Werner Herzog explains that Kinski repeatedly asked him to direct the film, but Herzog refused because he thought the script was "unfilmable".Herzog also states that the preparation for his role in "Kinski Paganini" caused the actor to take on an uncomfortable "alien" air that disrupted Kinski's performance in their last film together, "Cobra Verde".A biopic about the life of Niccolò Paganini, who many consider to be one of the greatest violinists who ever lived.