Fables: A journalist discovers that certain New York residents seem to have been living for centuries without aging. He believes them to be vampires. The residents of Fabletown decide to play along and convince him he was mind-controlled by them and forced to have sex with an Undead Child (in reality they knocked him out and took some suggestive photos with him and Pinocchio) and if he tells anybody their secret, they'll send the evidence to the police.
In the second volume of The Invisibles, a redneck in a diner is giving Lord Fanny, a Brazilian transgender shaman, a hard time. In response, King Mob grabs the man's groin (and not in a good way) and lectures the redneck that this is not a cowboy movie in which the redneck is the hero, but a horror film where he's the idiot who picks on a stranger who turns out to be a vampire or something. At first the redneck apologizes, but then he decides to attack King Mob anyway, and thus we get to witness the other trope invoked by King Mob in his little speech.
Joker: The primary POV character is a two-bit crook named Jonny Frost, who joins the newly-released Joker as he attempts to rebuild his criminal empire. Jonny's internal narration shows he thinks of himself as Joker's Number Two, that he's finally found his ticket to the big time as the right-hand man to the soon-be-biggest crime lord in Gotham. It's abundantly clear, however, to both the reader and the other criminals in Joker's employ, that Jonny is somewhere between a glorified driver and on-demand audience for the Joker's sick crimes, and he realizes far, far too late that he's living with a psychotic serial killer who won't hesitate to murder him as soon as it's convenient. Which he does.
Marvel Zombies: As depicted in Dead Days, a lot of the Superheroes early on seemed to believe that this Zombie plague is just the latest in a series of constant crises and that eventually things will get back to normal, as is often the case in the main universe. Pre-Zombie!Spider-Man rescues Ash and points out that his friends will have a hard enough time dealing with what they have done when, not if, they get back to normal, while an actually Zombified Colonel America manages to regain his composure briefly and insist they get help. If this had been the mainstream universe, they would be absolutely right, but alas, this is an Elseworlds tale. Only Richard Rider, Nova, is willing to point out how many they've already lost while only now working on a plan of attack during a group scene on the Helicarrier, explicitly claiming they are all doomed.
Goofy from Mickey Mouse can fall into this in some comics. He does NOT believe in magic, and there is no way to persuade him to do so. He would be right in a completely realistic setting, but his setting is only semi-realistic and magic does exist. Also, he can sometimes be proven right, which enforces his beliefs.
The Unbelievable Gwenpool is a human girl from our world (or somewhere in the Marvel multiverse that's similar) that likes comics and is sucked into the mainstream Marvel Universe. So, she knows many of the tropes relative to superhero comics but sometimes this can backfire on her.
In Champions (2016), Gwen crashes a confrontation between the team and the bigoted sheriff of a small town, causes chaos and forces the team to escape. In the clear, the team demands an explanation. Gwenpool reveals that she obviously saved them from some super villain action forcing them to be bigoted since this is a comic book; no one could be that bigoted! Kamala Khan says that things aren't so black and white and that people can be that evil without super villain influence. Indeed, Gwen gets incredibly frustrated by the lack of super villains showing up and leaves still thinking that a villain of some sort will show up. The only consolation given is O5!Cyclops telling Kamala that he hopes that she finds that super villain somewhere.
When Gwenpool encounters Deadpool, she says out loud that she'll be able to kill him because this is her book and she has Plot Armor. When Wade hears this, he figures out what's going on immediately and gives her a terrible "The Reason You Suck" Speech that points out how out of her league she is with him because his Plot Armor is much stronger than hers.
Deadpool: I've had hundreds of issues. I don't know how many series. I guest appear everywhere. Comics, video games, TV shows, and lets's not forget, the highest grossing R-Rated film of all time. You however, first appeared as a back-up in Howard the Duck because they weren't sure if anyone would like you. You are the last person who can kill me.
During War of the Realms, the Superior Spider Man recruits the latest incarnation of the West Coast Avengers to aid him as he has plans to bring the war to an end. Gwenpool has to convince him that, in actuality, he’s the Hero of Another Story and they should just focus on saving Los Angeles.
When the Wind Blows: Jim and Hilda think the coming nuclear war will be like World War II, which evokes memories of living through the war and even still thinking Monty is head of the British military. They quickly learn the hard way this is not true dying in the end painfully from radiation poisoning.
