The Life of the Party - S5-E22
Continuity mistake: At the singles party Frasier throws, Roz tells him she's in labour. She is not holding anything, but soon a small purse appears in her right hand, out of nowhere. When Vicky says "good luck" to her, the purse is nowhere to be seen.
Answer: In the last episode, they explained that Tossed Salad and Scrambled Eggs is a metaphor for the mixed-up people to whom Frasier dispenses his radio psychiatric advice.