Option #1: Tsuyu and Momo trapped in a broken down elevator with Eri when the former two start feeling the effects of that Taco Bell causing them to fart uncontrollably. Before they end up messing themselves, Eri uses her rewind powers to reverse their stomachs, causing them to start farting again and creating a situation where she has to constantly endure their farts and preventing a messier outcome until the elevator gets fixed. Epilogue designs.
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Option #2: Toph and Ty Lee are relaxing in a hot spring. Just then, Toph lifts her leg up and lets out a huge fart, catching Ty Lee off guard, mentioning that it's a hot spring that could use some bubbles. Seeing Ty Lee respond by farting as well, saying, "Hope you don't mind me adding some more," they proceed to fart in different positions and end with them leaving the hot spring, walking past Katara, telling her that the hot spring is free to use, and saying, "We made it nice and warm for you," as Katara looks disoriented at the aftermath.
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Option #3: The Zeldas letting off farts in their own way like the Zelda reaction meme:
Twilight Zelda using a pillow to try and muffle her farts.
Breath of the Wild Zelda using her hand to cover up her farts.
Ends with Super Smash Bros Ultimate Zelda just letting it rip with no remorse for anyone around her and knocking the other ones out.
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Option #4: A sequel to Sayori's Emergency Fart Cushion featuring Natsuki and Yuri. In the cozy, quiet clubroom of the Literature Club, the afternoon sunlight filtered through the windows, casting a warm glow on the room's wooden floor. Natsuki and Yuri were cleaning up after the day's activities when something on the floor caught their attention. Curiously, they bent down to investigate, only to discover Sayori's Mr. PIg Plush which dropped from her bag after leaving earlier in the day.\par
Iniitally confused, Natsuki starts to feel an inclination to fart on it for some reason.
"This could be fun!"
Yuri, ever the composed and reserved one, was more hesitant, though her curiosity was undeniably piqued.
"It... it certainly is unusual," she muttered softly, her violet eyes fixated on the doll, but she eventually decides to play along too.
For the next hour, the two girls took turns tormenting their tiny victim with their butts and gas, enjoying every second of their playful dominance. What had begun as a quiet afternoon in the literature club had turned into an unforgettable, mischievous game of control and humiliation- one they'd likely never forget.
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Option #5: Gold Ship working out at the schools gym (deadlifts, bench press, squats, leg presses) casually letting out huge farts grossing out the other Umas until she looks around confused that all the other Umas left the gym to get away from Gold Ship.