The episode: “Attack of the Giant Leeches,” ep. 406
The riff: Spoken in a deep, intimidating voice by Crow as a gaggle of country yokels drink booze and loiter in what appears to be the town’s general store.
The explanation: Crow seems to be making a joke about the shifty looks of this band of rural nogoodnicks, but the main part of the riff is the “Hooterville” reference. Hooterville was the name of a small, rural American town that was near the setting of two 1960s-1970s television shows, “Petticoat Junction” and its spin-off, “Green Acres.” Although the size and constitution of the town varied between the series, it shared a few recurring characters with both series and was meant to be an average American rural town.
Novelty factor: I know vaguely about the premise of both shows in question, but I don’t think I’ve ever even hard the name Hooterville before.