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."
Amongst Jerry's (Jerry Seinfeld) innumerable girlfriends are 3 future Desperate Housewives (2004), Marcia Cross, Brenda Strong and Teri Hatcher.
The television show MythBusters tested the theory that double dipping was like "putting your whole mouth right in the dip" on the April 22, 2009 episode. 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, who Kramer (Michael Richards) believes he spotted at the health club, is a real life British Indian writer, whose 1988 fictional book, "Satanic Verses," was critical of Muslims. The leader of Iran, Ayatollah Khomeini aka Ayatollah Khomeini, issued a "fatwa," (Islamic religious declaration) calling on Muslims worldwide to assassinate Rushdie, forcing him to go into protective hiding.