Cars is an exercise in surrealistic black comedy, about a small New South Wales country town which survives on carnage. The townsfolk arrange smashes of innocent folk driving by in their Holdens, Falcons or even Jaguars. If the drivers are dead, they're buried and forgotten. If they survive, they're quickly given power-drill lobotomies and treated quite fondly as the town's vegetables.
The Plumber is a very well structured thriller with elements of black comedy - it's very Pinteresque in that the suspense and drama come through its words and atmosphere, not through explicit action. Plumbing maintenance turns into psychological and class warfare. White-collar confronting blue-collar across a chasm of sinks and sewerage. The ending is both surprising but somehow inevitable in this little bathroom-sink drama. Excellent!