Crumb, a 1994 documentary about underground cartoonist Robert Crumb who is notable for creating famous works depicting American folk culture from the late 19th century into the early 20th century.
The film chronicles the life and career of Robert Crumb and highlights some of his most well-known pieces. For its unique insight into one of the most important cartoonists of all time "Crumb" is considered by many critics to be one of the greatest documentaries ever made. Though in my opinion, this is a rather subjective claim.