You can see Mammy Two-Shoes' face for two frames as she runs back to the house.
The title refers to the Saturday Evening Post, a magazine that publishes current event articles, editorials, human interest pieces, humor, illustrations, a letter column, poetry, single-panel gag cartoons and stories by the leading writers that has roots in Benjamin Franklin's The Pennsylvania Gazette that was first published in 1728. The magazine is also well-known for its lavish cover art that include the work of Norman Rockwell.
Jerry Mouse was voiced by Bill Hanna in the drowning noise of the jazz music by the partying cats.