Then there’s this 1994 documentary, about the eccentric underground comic artist R. Crumb. His story, too, figures in part of another artistic offshoot: Crumb turns out to be instrumental in inspiring the career of even more eccentric underground comic writer Harvey Pekar, whose story was told so brilliantly in 2003’s American Splendor, with Paul Giamatti as Pekar and James Urbaniak as Crumb.