Sidra's parting shot to Jerry at the end of this episode was scripted as simply "And, by the way, they're real." Teri Hatcher ad-libbed the kicker "...and they are spectacular." This line is repeated by Jackie Chiles in The Finale (1998).
In Salman Rushdie's non-fiction book Joseph Anton: A Memoir, Rushdie recounts bumping into Jerry Seinfeld at a cocktail party where Seinfeld nervously asked his opinion of "The Implant" and "visibly relaxed" upon Rushdie's telling him "that he had thought the episode very funny."
Among the numerous women whom Jerry dates are three future cast members of Desperate Housewives (2004): Marcia Cross, Brenda Strong and Teri Hatcher.
MythBusters (2003) tested the theory that double dipping was like "putting your whole mouth right in the dip" on Banana Slip/Double Dip (2009). The MythBusters found that double dipping produced fewer microbes than putting all the dip in your mouth. Also, the amount of microbes present was negligible compared to the amount found in regular dip.
Salman Rushdie, whom Kramer believes he spotted at the health club, is a real-life Indian-British writer whose 1988 fictional book, "Satanic Verses," was seen as critical of Muslims by some. The leader of Iran, Ayatollah Khomeini A.K.A. Ayatollah Khomeini, issued a "fatwa," (Islamic religious declaration) calling on Muslims worldwide to assassinate Rushdie, forcing him to go into protective hiding.