At one point in Terry Zwigoff’s Crumb, the documentary’s main subject confesses to being aroused by Bugs Bunny. Astonishingly, this man turns out to be the most well-adjusted member of the family. This is no typical tribute to an artist comprised of endless footage of fans extolling the virtues of their hero. Even the title suggests Zwigoff is interested in the family as a whole rather than simply the celebrity in their midst.

Zwigoff is best known for Bad Santa and Ghost World, films about isolation and longing with more than their fair share of misfit characters struggling to get by in the world. His breakthrough, Crumb, proves the old adage that the truth is stranger than fiction and centres on the legendary underground cartoonist Robert Crumb and his two brothers. Rarely can a documentarian and his subject have been so perfectly aligned and the result is unlike anything else committed to film.

The director worked on the film for nine years and later said he was “averaging an income of about $200 a month and living with back pain so intense that I spent three years with a loaded gun on the pillow next to my bed, trying to get up the nerve to kill myself.” This is a portrait of the artist as a strange man made by a similarly iconoclastic figure.

For some, this will be too much to bear and cinema walkouts were not uncommon at the time of the film’s release. During the years of filming, Charles Crumb, the older brother of the artist, was still living with his mother in the family home and rarely ventured outside. He emerges as a tragic figure and Crumb is dedicated to his memory since he committed suicide prior to its release. The film’s producer, David Lynch, was so taken with the man that he had considered writing a screenplay for a film for him to star in. Maxon, Robert’s other brother, is a man tormented by his own demons and the frank discussion of his sexual desires is uncomfortable in a manner almost unparalleled in cinema.