First there's the horse-wank. Repeated later with an elephant.
Then the deer carcass.
Then the birth.
When Betty tries to give Gord a blowjob, we see Gord's umbilical cord is taped to his stomach for some reason.
Gord's dad tries to proposition his mother by making some very freaky faces. Plus we see his wrinkled old arse.
The Zebra-Man cartoon isn't immune to this either. The promo shows Gord's Author Avatar getting his jaw ripped off by his father, then he's roped to the back of a car and driven around with what's left of his face getting ground up by the road.
The movie ends with a little boy getting chopped up by a propeller. He survives, but with the amount blood he'd lost he'll probably die before they can get him to a hospital.
True Art Is Incomprehensible: Along with Ebert's quote at the top of the main page, A.O. Scott of the New York Times stated that several skits, such as "The Backwards Man" and the infamous "Sausage Piano" scene may have qualified for a National Endowment for the Arts grant if they weren't from a Hollywood film, and said that they might still go on to appear in the New York Museum of Modern Art someday.