* CreatorBreakdown: When a reader asked Campbell whether it had distressed him to get inside Cyndi's mind and think like a person with antisocial behaviour patterns, he stated that it was disturbing to get into both her ''and'' Charlotte's heads and that it made him "a neurotic mess" at times. He also revealed that he based the toolshed on the one in his parents' yard, and as a result developed a phobia of it.
* MemeticMutation: "Hee." Although Cyndi's [[SignatureLaugh signature sadistic giggle]] had appeared a few times before, its appearance at the moment of Charlotte's suicide attempt solidified its association with Cyndi, such that it appeared often in FanFiction, and became an in-joke on the forum (e.g., [[LampshadeHanging lampshading]] one's avoidance of typing a single "Hee" in a post lest it give the appearance of Cyndi having written it). Campbell himself said that he nearly had Daphne say "Hee" in [[http://www.pennyandaggie.com/index.php?p=1234 this later strip]], before realizing how readers might take that, whereupon he changed it to "Heh."
* MoralEventHorizon: Cyndi manipulating Charlotte into attempting suicide.
* PortmanteauCoupleName / AscendedMeme: Cyndi refers to the former Stan/Brandi couple as "Standi," well after the fandom had coined that name.