Leonard Nimoy sings a ditty about Biblo Baggins the Hobbit in the Spock vs. Spock car commercial. Since golf was a prominent theme, I thought this was a cute reference to “The Hobbit” movie about the ancestor of Biblo Baggins, Bandobras “Bullroarer” Took, who loped off a goblin head into a rabbit hole to invent the game of golf.
The song, “The Ballad of Biblio Baggins” was sung by Nimoy for a variety TV show in 1967, when “The Hobbit” and “The Lord of The Rings” by J.R.R. Tolkien became popular with the baby boomers in the United States. As “Star Trek: The Original Series” was in production at the time, Nimoy sported his Vulcan haircut during this appearance.