The episode: “The Killer Shrews,” ep. 407
The riff: Opined by Joel as an old guy with a mustache cheerily leads a couple of young boys off screen.
The explanation: Joel is impersonating actor Wilford Brimley, who appeared in a bunch of commercials for Quaker Oatmeal in the 1980s. “It’s the right thing to do” was actually a slogan, perhaps the first time I’ve ever heard of a moral imperative as far as breakfast is concerned. They made a ton of these commercials.
Novelty factor: I don’t remember this ad campaign, but I find its insistence on oatmeal-eating to be a little unsettling.