Modes of Transportation
Marvin K. Mooney may not have a choice about whether or not he leaves, but he has a variety of options available to make himself sparse. Did Seuss miss any type of transportation? Brontosaurs maybe...
The Rug
Even something as insignificant as a rug can be important in the right context. Literature can be devious like that. How devious does Marvin K. Mooney get? Well, the rug doesn't make an appearance...