When Henry is in the quicksand, he is at different depths in different shots.
John Astin's Addams Family character Gomez has a relative named Uncle FESTER.
In this Gunsmoke episode Astin's character of Henry Haggen has a kinfolk who we all know, of course as FESTUS.
There are many references to the Addams family in this episode. For instance, the background music sounds very much like the Addams Family theme, and when Jefferson Dooley (the Royal Dano character) reaches into the wagon and feels around to discover the gold, his hand action is much like "Thing". Pretty funny stuff.