Friends · S8 E9Sleuthed by @sundance#002
Friends · S8 E9 · Joey
Swollen-fingers prank in the cold open: What to Expect When You're Expecting
In the cold open of S8E9, Joey Tribbiani reads Rachel's copy and tells her pregnancy swells fingers to twice their size for good. Rachel panics and grabs the book to check, then throws it at him in disgust while he laughs that she falls for it every time. Joey has read exactly enough to be dangerous.
Sources: Friends Wiki (Fandom) · Book Riot · Forever Dreaming Transcripts · Comegetsome Friends · Web research summary (from Friends Wiki (Fandom), Book Riot, Forever Dreaming Transcripts, Comegetsome Friends, Spotern) · iHeart (Pod Meets World podcast), TGI – Friends 809 The One with the Rumor · Lives in a Box (transcript), The One With The Rumor