- Pinky and Uma's harmlessly poking each other with a stick contest in "Shadow Snark"
Pinky Pie: TO THE DEATH!
- In Those Who Stand for Nothing Fall for Anything Light and L almost come to blows over how Light wants his steak cooked. (Though it turns out they have ulterior motives for doing so.) Light's suits are also Serious Business:
"Where are my clothes?"
"They're in the sink," he says with a pharmaceutical smile.
"What? No," I gasp. 100% rare breed wool from the Shetland Islands. Woven by nuns. "They're dry clean only, you bastard!"
"Oh. That explains the strange colour of the water. I rinsed them through with boiling water and now they're soaking in cold water. Is that ok? I put ice in it. It's like suit mojito in the kitchen."
"Light, I'm sure that he just overlooked the washing guidelines," L sighs, putting his trousers on under the sheets. "You have other suits."
- A Mighty Demon Slayer Grooms Some Ponies is about ponies deciding to make First Contact with humanity by participating in a horse show, and for that they need to be well-groomed. Grooming is treated with varying levels of mock-seriousness throughout the story, including one character stating that "the future of two worlds depends on you having a well-brushed coat".
- In The Universiad, a Spacebattler story the Forum once got into a civil war over paper. How serious? It lasted 15 years and the Originals still pay remembrance by having annual 15-day long live-fire "reenactments".
- In Cultstuck, the titular cult treat everything related to Karkat as this, because they believe him to be their messiah reborn. This is the source of much comedy (and guilt on Karkat's part, because he's just a teenage boy and can't be worthy of their Undying Loyalty).
What was it they were truly after when they threw away their old lives and burrowed underground, sewing you a jewel-studded robe while living in monastic poverty? More than ever before you feel like a sham, a fake, a con-troll taking advantage of these people's desperate yearning for innocence.
- A New World, A New Way sidestory '"Swarm'' has Emperor Carapace treat his private garden as such. He almost stated a war against the Griffins because an ambassador accidentally stepped on his favorite flowers.
- In Yu-Gi-Oh! The Thousand Year Door Redux, Adrian makes a rather bold accusation towards the Shadow Spawn during his "The Reason You Suck" Speech, and it also applies to their mother and all villains in general in the canon source franchise, claiming that the only reason any of them consider the card game Serious Business is so that they can pretend they have a sense of honor and fairness by using a system with rules, to prove they are better than common thugs. He also calls this attitude "blatant lies", obviously referring to how such people tend to manipulate and outright break those rules on a regular basis.
- This is driven home in a much later chapter, during Andy's duel with Sir Grodus when Andy asks where he got his cards:
Grodus: Custom made by evil sorcerers working for Grazízt. Same as guys like Dartz, Saiou, and that whole crowd. What? You really think folks like me get them from hobby shops?
Andy: In other words, Adrian had a point. The whole idea of you guys using Duel Monsters to fight people is to make them think you have a sense of fair play, just so you can look honorable and be a dirty cheater at the same time.
- In the parody Dark Demon King Ravenblood Nightblade and the Library with Bad Feng Shui, Twilight's reaction when her library is desecrated is to cause a small earthquake and ascend to alicornhood through sheer rage.
- In Weiss Reacts, antics, shipping, and gaming. For the former two, Yang fights actual wars against her rivals to try to push her as the best shipper and prankster, and for the latter, people actually strategize as if it was a real war and act like they're killed when defeated in-game.