Sylvester spells that magic word as "RAGG MOPP," which is a nod to the title of a popular song by the Ames Brothers.
The house pictured is meticulously illustrated down to the plants and the decorative trim on the furniture. Cartoons from this era were generally detailed in this manner, to appeal to the adult cinema audiences where the shorts were screened. TV cartoons had not yet become a broadcast staple yet.
One of Sylvester's favorite adversaries, a bulldog, makes an appearance.
Sylvester first breaks the fourth wall with one of his signature lines.