Disclaimer: Not JK Rowling. Just playing in her sandbox.
Harry idly scratched at his cheek and sighed. The Potions essay was due in the morning and he only had six inches done of the required twelve inches. The library was quiet, but a low rumble was coming from the next table every now and then. Madame Pince had already shushed them once and to be honest, Harry was getting a little annoyed at the fan girls gushing over Victor Krum.
Hermione sat down beside him with another book for her Runes project and started taking notes. The fan girls started talking again and Harry snorted in exasperation as he looked over at the next table.
Then, Madame Pince appeared. She looked quite furious and Harry sat back down to await her kicking out troublemakers.
"That's IT," Madame Pince roared. "Everybody out!"
The girls at the next table jumped, and then started scrambling for there stuff. Hastily cramming their things into bags they quickly left the library. Madame Pince glared at them and then turned back to Harry and Hermione. "Well, what are you still doing here?"
"Excuse me," Harry said. "I'm trying to do an essay that is due in the morning."
"Well, that's too bad," replied Madame Pince. "You should have done it earlier when it was assigned! Pack up and get out of my library!"
Harry looked at her in disbelief. Then he frowned. "The essay was assigned this afternoon by Professor Snivelous, due tomorrow morning!"
"That's not my problem!" replied Madame Pince.
Harry looked down at Hermione who was sitting there with her mouth open collecting flies. He clinched his fists, then counted to ten. "Nope, still mad." "Dobby!" Harry roared out.
Dobby popped in and before he could get a single squeak out Harry yelled, "Get Professor McGonagal and or the Headmaster here right now!"
Dobby cowered and popped away. Three seconds later he reappeared with Professor McGonagal and disappeared again. Another three seconds and he reappeared again with Headmaster Dumbledore who appeared to be sitting down on nothing before he fell back to the floor.
McGonagal screached "What in the world is . . ."
Harry raised a hand in a stop motion whilst glaring at all three adults.
"I've had it!" he seethed. "I'm here trying to do an essay for Snivelous that's due tomorrow morning and the banshee from hell is trying to throw us out!"
"Harry my boy . . ." the Headmaster started to say.
The glare coming off of Harry directed at the Headmaster shut him up.
"I've been in here, in the library for the last three hours trying to come up with enough information on fluxweed for a twelve inch essay that Snivelous assigned me three and a half hours ago," he snarled. "I've done nothing wrong, and the essay is due tomorrow morning!"
"But that's . . . McGonagal started and stopped when the glare transferred to her.
"Not by the rules! I know that!" Harry screamed. "That doesn't stop his pet Death Eater from requiring it!"
"And another thing!" Harry turned to Madame Pince. "That'll be one thousand galleons!" Harry stated holding out his hand.
"What do you mean?"
"I mean, that I paid the school one thousand galleons for access this year as part of my tuition, for the library! You wanna kick me out, I WANT A REFUND!"
He He . . . Just poking a little bit of fun at the librarian.