The traditional song "Poor Wayfaring Stranger" was performed by Johnny Cash on one of his final albums, American III: Solitary Man. Cash died one day after John Ritter, whose character was said to sing this song on the way to the cabin at the lake.
Kyle says "God is a comedian playing to an audience too afraid to laugh." This quote is attributable to H.L. Mencken as "Creator - A comedian whose audience is afraid to laugh."