When he was trying to raise funds for the film, Terry Zwigoff encountered Terry Gilliam whom he knew had worked with Robert Crumb in the late 60s. Approaching Gilliam, Zwigoff asked for some help with the budget. Gilliam reached into his pocket, handed over a nickel and then walked away.
Filmed over a period of six years.
According to Robert Crumb, after his brother Charles committed suicide the first thing his mother said to him was "How could he do this to me?!"
During his years-long, money-starved struggle to make this documentary, director Terry Zwigoff was laid up in bed with crippling back pain and was suicidally depressed.
Media reports following the film said that Robert Crumb later told Terry Zwigoff that he hated the film. According to Zwigoff, however, this never happened and the two still speak on a regular basis.