"It's time you proved your loyalty to us. Here's the plan."
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In the Great Hall that night, dinner had progressed to dessert without a hitch-- well, Colin Creevey did shoot pumpkin juice out of his nose when Harry made a funny joke about Snape, but as Ron wasn't one of the unlucky ones sitting across from him, he didn't really count that as a problem. Yea, the plan was working out nicely. No one thought twice as he excused himself to use the 'loo during dessert, and when he came back, those slobs had eaten nearly all of it.
Crossing his arms in front of his chest, the redhead smirked in anticipation. As the plates were cleared and most groaned in sleepy fullness, Headmistress McGonagall stood. Silence fell over the Great Hall as she eyed them sadly. Absent from the start-of-term proceedings last night, McGonagall planned to make her first address as Headmistress of Hogwarts, and all in the Hall sat attentively.
"Welcome to another year at Hogwarts. I apologise for my absence last night, but we all know how quickly tragedy strikes in these times." She paused, frowning, her eyebrows knitted closely together. "Before I send you off to -" Pause again. Frowning further, she eyed the table behind her significantly, holding her stomach. The redhead couldn't help but smile as he watched the scene unfold before him. They're going to be so proud of me! Infiltrating the school before the semester even begins! "Excuse me." Holding her stomach with both hands, the Headmaster stumbled as she left the podium. Ron grinned as the Head Table soon reacted the same way.
As all but Flitwick held their stomachs, Ron chanced a glance around at the rest of the Hall. People began to sweat vigorously, and he watched bemused as a few second year boys ran out of the Hall. Soon a torrent of people were leaving, most with shocked looks upon their faces, all holding their stomachs. The bathrooms were swamped by people, and the few that were left in the Great Hall were soon directed to their common rooms by Flitwick, the only professor to refrain from the Treacle Pudding.
As Ron led a first year up to the Fat Lady, he was laughing openly. Guiding her to her dormitory, he pulled a small box and a pouch from the depths of his robe. "Weasley's Wizarding Wheezes!" he said, sticking his head into the fire.
"Did you do it?"
"Yea, it was BRILLIANT, Fred!"
"Do you have the leftovers?"
"Yeah," said Ron, throwing the box of U-No-Poo at his older brother. "It worked great, George, even McGonagall fell for it!"
"Aw, I think our little Ronniekins is growing up!"
"Aw, shove off!" Ron said, though even he had to grin as he reemerged from the fire. Wiping ash off himself, he settled into his favourite chair and waited for Harry and Hermione to return.