"Ticket to the Moon"

I'd forgotten about this until recently, but a few weeks ago, I was thinking about "Ticket to the Moon" again and noticed an-other small feature in the lines "I paid the fare; what more can I say / It's just one-way."  The backing vocals there are "Only one way," and these words are sung to a melody that almost exclusively ascends (C# C# D E), so even musically, there's a singleness of direction.