One sunny afternoon in the backyard, Phineas was struck by a peculiar mood that no one in Danville had ever witnessed before. It all started when Ferb accidentally painted a stripe of green across Phineas's favorite red shirt.
"FERB!" Phineas's voice hit a pitch only Perry the Platypus could hear. "This was my favorite 'I-know-what-we're-gonna-do-today' shirt!"
Ferb, unfazed as always, simply raised an eyebrow and handed Phineas a wet rag. But Phineas was having none of it. He stomped his foot, crossed his arms, and pouted so fiercely that even the birds stopped singing to watch.
Just then, Candace burst out of the house, phone in hand, ready to bust her brothers for their latest contraption. But what she saw was... Phineas? Throwing a tantrum?
"Mom!" Candace dialed with record speed. "You've got to see this! Phineas is acting like a toddler!"
But as fate would have it, every time Candace tried to snap a picture, Phineas miraculously appeared calm and collected. The green stripe? It vanished, leaving no trace on his red shirt.
Candace blinked. "But... but... he was just..."
Phineas, now serenely sipping a juice box, smiled sweetly. "Was what, Candace?"
Ferb shrugged, offering Candace the wet rag.
And so, the day went on with Phineas's mood swings becoming the stuff of legend. Each outburst was more dramatic than the last, and each time Candace tried to document it, the evidence disappeared as if by magic.
In the end, it turned out to be one of Doofenshmirtz's less successful inventions: the 'Temper-Tantrum-Inator', which inadvertently targeted Phineas. But once Perry foiled the evil scheme, balance was restored.
Phineas, back to his inventive self, chuckled. "Well, I guess everyone has their off days, huh, Ferb?"
Ferb nodded, already painting over the last green stripe on the fence.
And Candace? She decided that some things are better left un-busted.