- Archive Panic: Averted by the archive's arrangement by issue, and by Peter's conscious decision to keep each individual story as self-contained as possible so anyone can jump in anywhere. Electric Wonderland is the exception, being more continuity-heavy. The banners don't have their own archive, though.
- Growing the Beard: Mulberry and Electric Wonderland show greater attempts for depth than the older comics do. Art Evolution also seems apparent in all but the youngest of the flagship series.
- Anvilicious: "Vess MacMeal Starring in: The More You Know!" It seems possible this happened on purpose, since the comic acts as a throwback to cautionary stories written during the Cold War.
- Hilarious in Hindsight: The ending of "Vess MacMeal Starring in: The More You Know!" seems even more implausible when considering the person depicted as the antagonist died less than two months after the comic's release.
- Sequel Displacement: Even though Peter calls "Raiders of the Lost Arc" his favorite Platypus Comix story, he has an open hatred towards the half written in 1998. As a result, the website only features the half from 2001, set post-9/11.
- Big-Lipped Alligator Moment: "My Ocarina of Time Walkthrough" has a point in which the player asks, "How do I defeat Jenova?" Instead of stating that Jenova comes from Final Fantasy VII, not Ocarina of Time, Peter fabricates instructions on how to gain the abilities to turn into a werewolf and "Omnislash". He caps off his response by warning that defeating Jenova will cause the N64 to explode.
- "Funny Aneurysm" Moment: Peter advises in "The Five Best Sets Ever" that since Time-Life cut the price of The Real Ghostbusters: The Complete Collection in half, an '80s kid "...should buy this yesterday." Some time afterward, Time-Life lost the Real Ghostbusters DVD rights to Sony Pictures, causing their collection to disappear, in favor of Vanilla Editions containing fewer episodes, and no bonus features.
- Harsher in Hindsight: The review of Kids' WB!'s final day includes a lament about the likelihood that World of Quest would end after 13 episodes, then never air on US televisions again "until it appears on Toon Disney at 3 in the morning in the year 2014." Not only did the second season of World Of Quest air only in Europe, but Peter just happened to write that review mere months before Disney announced they had decided to replace Toon Disney with Disney XD. On the bright side, his Exact Words don't give a completely correct prediction of the future of World Of Quest; he feared it would disappear from the face of the Earth.
- Hilarious in Hindsight:
- "My Ocarina of Time Walkthrough" claims that beating The Running Man in a race will grant the player a werewolf's curse. Five years later, The Legend of Zelda: Twilight Princess starred a Link who could turn into a wolf.
- Reading Peter write, "Spidey is red-hot and Batman is red-not. But stuff happens.", evidently unable to foresee The Dark Knight Saga rebuilding Batman's fame, and Spider-Man 3 causing Spider-Man to lose his.
- In 2004, Peter found a cartoon on Telefutura starring a homely schoolgirl named "Betty." After watching an episode, he published a review online, titled "The most obscure cartoon I can possibly review." Two years later, the character of Betty La Fea was formally introduced to America with the successful sitcom, Ugly Betty, prompting Peter to retitle the article (now called "Ugly Betty: The Cartoon Series") and rewrite the opening and concluding paragraphs.
- It feels jarring now to read this volume of "The Ancient Lost Art of TV Guide Advertising" and remember a short time when Peter would talk about Free Spirit without batting an eyelash, never mind gushing about Winnie Goodwin or desiring to write better stories for her.
- "Why you may never see some of your favorite childhood shows on DVD" has an offhand comment that NBC took so long to release Saturday Night Live season one on DVD, that "...they'll never get to the seasons nobody cares about." This took on a new meaning after NBC decided to stop releasing SNL complete season DVD boxsets after season five, the last one to include any of the Not Ready For Primetime Players as regular cast members.
- "The Ancient Lost Art of TV Guide Advertising" Vol. 7, "The Bicentennial", shares a cover◊ promoting the Wonder Woman TV show. Underneath, Peter laments that Wonder Woman apparently doesn't seem relatable enough for her own theatrical movie, with the rejection of a Joss Whedon-penned screenplay prompting him to declare, "if Joss can't make it work, no one can." Eventually, Allan Heinberg and Patty Jenkins would respectively pen and direct Wonder Woman's first big-screen solo movie, and turn it into the first critical darling among the DC Extended Universe's films. This statement might have also become Harsher in Hindsight during the year of that movie's premiere, due to the scathing receptions of Joss' leaked Wonder Woman script, and the first released DC film with him as a credited screenwriter, Justice League (2017).
- Older Than They Think: As noted in a later installment of "Worst Comix Ever!" Peter reviewed Tandy Wiz Kids #2, "Fit to Win!" years before it appeared on Atop the Fourth Wall.
- The Woobie: Reading about Peter Paltridge's real life can get depressing sometimes, especially in the article about middle school bullies.
- Hilarious in Hindsight: The "Pony-Free Since 2001◊" banner took on some irony after a self-proclaimed Pegasister became one of the most frequent posters on the Platypus Comix forum.