In the opening, Roz (Peri Gilpin) pretends to be a caller named Susan from Texas. Gilpin's accent comes naturally since she was born and raised in Waco, Texas.
It won an Emmy Award for Outstanding Art Direction for a Multi-Camera Series.
In the opening when Roz pretends to be a listener/caller, she uses the microphone instead of a phone line. Therefore her voice sounded like an in-studio broadcast and not a telephone call.
The title refers to an exclamation that has subconscious meaning called a Freudian slip.
Niles Crane's Nightmare about Being a Bad Parent could haven been planted in the Season 2 Episode 'Flour Child'