An Elephant Makes Love to a Pig/Trivia

Trivia

 * This episode contains one of the first mentions of Cartman's mom's promiscuity. It also sheds a little light on Cartman's behavior possibly stemming from sexual abuse by Cartman's mom (such as being forced to dress like a mailman). Although the fact that Cartman rants about his mom "having sex with some guy I don't even know on my dad's bed" when Cartman has no father has been taken by some to imply that Cartman is simply going on a bizarre rant with no connection to reality, this reference is likely due to the fact that the creators had simply not decided that Mrs. Cartman was a single parent at this point of the series.
 * Half of a scene that takes place in the lunchroom appears in the same frame-by-frame cardboard cut-out style that the pilot episode was shot in. The style is notably different from the rest of the episode, including a noticeable difference in voices, mouth movement, scene coloring, and character positioning. The reason for this is that the scene was originally part of the pilot, but was cut for time and then inserted into this episode.
 * Mephesto is revealed in this episode to be a Buddhist. ("Oh, thank Buddha I found you boys!)
 * It is revealed by Kyle in this episode that Cartman dosen't get a grade higher than a D.
 * Kevin Stoley appears in this episode, and is called "Kasey" by Mr Garrison.
 * Shelly is based on Trey Parker's real sister, Shelly, who is three years older. When they were kids she used to beat Trey up, lock him out of the house, and once even threw him down a flight of stairs.
 * Kevin is seen on the little bus.
 * In the DVD commentary this episode was referred to An Elephant Fucks a Pig.
 * This episode was one of the episodes used in South Park (video game), as the second level "A Clone Of Your Own".
 * This episode was the debut of Shelly, Sharon Marsh, Terrance Mephesto and Dr. Alphonse Mephesto.

References to Popular Culture and History

 * This episode was likely inspired in part by Dolly the sheep, who was the first successfully cloned mammal. Dolly was created on July 5th, 1996 and died on February 14, 2003.
 * Cartman tells Kyle to go back to San Francisco "with the rest of the Jews." Cartman likely has the Jewish mixed up with Hippies, another group that he hates. The Hippie movement still endures, or is at least a common stereotype associated with San Francisco. Kyle actually does move to San Francisco later in the episode Smug Alert!.
 * The character Mephesto is a parody of actor Marlon Brando, who played the role of Dr. Moreau (a genetic engineer) in the 1996 film adaptation of the story The Island of Dr. Moreau. This is shown more obviously in Cartman Joins NAMBLA when he is part of a club of Marlon Brando look alike club.
 * According to both Dr. Mephesto and Chef there is a song by the band Loverboy titled Pig and Elephant DNA Just Won't Splice. In real life, Matt Stone and Trey Parker's band, DVDA, recorded the song with Loverboy.
 * The fetal Stan clone in the incubator in Mephesto's lab resembles the baby fetus depicted at the end of the film 2001: A Space Odyssey.
 * While singing the song "Love Gravey", Chef is backed up by singer Elton John. This is an impersonation, and it parodies his singing style specifically his singing of the song Can You Feel the Love Tonight which was featured in the 1994 Disney film The Lion King. The song was re-written as 'Tonight is right for love' on the Chef Aid album with MeatLoaf taking the place of Elton. Ironically, Elton had his own song ('Wake Up Wendy') on the album too.
 * Officer Barbrady suggests that the boys have seen too many episodes of the X-Files.
 * Pip is directly from Charles Dickens' Great Expectations (Philip Pirrip). He quotes from the first paragraph of the book.
 * The last line of the show "That'll do, pig." is from the movie Babe after Babe wins the contest.

Goofs

 * Mephesto is seen taking blood from Stan, but Stan's sleeve was covering his arm. It's realistically impossible to take blood from the arm if there is a sleeve in the way.
 * Throughout the episode, Terrance talked in a fairly high, child's voice. However, when he presents the 'five-assed monkey', he has a deep, evil villain kind of voice.
 * The next day when the pig gives birth, Kenny is in the class, when he had died, but this is probably because it was another day. He then disappears when the class look at the garrison like pig.
 * When Stan's picture appears in the news report, part of his puffball is covered up by his hat.

Kenny's Death

 * The Stan Clone knocks Kenny into a microwave with a chair. He is then cooked by the microwave.

Hidden Visitor(s)
On the "Our Pets" pegboard in the upper center there is the head of a visitor.

Deleted scene
200px|right|thumb|Video of Deleted Scene There was a scene where Shelly lights Stan on fire and dumps water on him three times, but it was deleted in fear that kids would try to imitate it.