Oddly enough, Joaquin Phoenix, who plays the benighted Callahan in a brilliant new movie, 'Don't Worry, He Won't Get Far on Foot' has also had his struggles with alcohol and was also almost killed in an auto wreck of his own making.
Next stop, Alcoholics Anonymous, and the most hilarious (and touching) scenes in this movie are set in the home of his wealthy hippie sponsor, who guides Callahan along the perilous road to sobriety.
We could all do with a stretch in AA - not necessarily for substance abuse, but because of the ruthlessly sane philosophy it propagates. Self-pity and self-serving whinging are very much off the agenda, and the heart of the AA philosophy is an invocation to the alcoholic to take complete responsibility for his life.
After pouring out his woes, and receiving scant sympathy from the group, Callahan abuses an obese young woman for her heartlessness: 'How can you know what I'm going through?' he whines.
'Actually,' she says, 'I have cancer of the heart.'
And what art!
His cartoons, published widely throughout the USA, at first glance appear to mock the plight of the disabled, the marginal, the despised, but in fact are unerringly accurate about the patronising way minority groups are treated.
In another cartoon, a large and threatening perimeter fence, topped with barbed wire, is sign-posted: WARNING, AREA PATROLLED BY LESBIANS.
What offended Callahan most, and what Gus Van Sant's movie clearly depicts, is the way marginal or minority groups are handled with social awkwardness and embarassment, but rarely treated with the brusque equality and respect he craved.
Callahan's cartoons teeter on the brink of the repugnant, and it's this very high-wire act that makes them so compelling. He would delight in publishing the (copious) hate mail he received ... and it is precisely this mischievous iconoclasm that makes him such a riveting figure.
Now dead, after a mishandled operation for his bed sores (something he would have cartooned with glee), Callahan's story is an unmissable look at a truly gifted artist with a fanatic's heart ... a man who rushed in to zestfully occupy the zone that angels fear to tread.