Near the end, Ethan refers to "the Arkansas" (river), pronouncing it AR-kan-SAW, the only correct pronunciation for both the river and the state. Native Kansans, including Matt Dillon, deliberately mispronounce the river as the ar-KAN-zus, which has never been correct for either the state or the river.
This episode is an Andy Griffith episode, Deputy Otis from May of 1962. Season 2 ep 31.