The episode: “The Undead,” ep. 806
The riff: Intoned by Mike as a “medieval” knight inquires to a peddler about an escaped witch.
The explanation: I believe he’s referring to the knight’s rather uninspired vocal delivery or lack of attempt at a “period accent” like most of the other characters have. Muncie, Indiana is a small city in East Central Indiana, to the northeast of Indianapolis. It’s home to Ball State University and is the birthplace of the “Garfield” comic strip.
Novelty factor: I have been to Muncie exactly once. I volunteered at a beer festival there and had a pretty good time.