Tangerine-haired John Callahan was an alcoholic and artist, best known for cartoons that colored outside the lines of political correctness. His humor was subversive, satirical and sarcastic. His movie should be, too, right? Not so fast. Gus Van Sant has too much reverence for his subject to fully dive into the ugly side of Callahan.A quadriplegic since a drunken-driving accident at age 21, Callahan found his creative calling on his journey to sobriety.