Filch watched as Mrs. Norris pushed her ears back; his rage grew inside him...
"I'M JUST MOPPING THIS BLITHERING PUDDLE UP BEFORE I SLIP OVER IT AGAIN, DEAR. NOT TRYING TO HURT YOU!" he yelled, his left arm flailing in the air; he really did look like a madman now, while in his right hand, the mop dragged behind him as he hobbled quickly towards the puddle, which just happened to be in the same direction Mrs. Norris sat.
Mrs. Norris didn't see her master now; all she saw was a madman frantically hobbling towards her with a mop as he yelled all sorts of gibberish at her while he waved an arm in the air as a threat. 'HE'S REALLY GOING TO KILL ME! HE REALLY IS! DUMBLEDORE, YOU GREAT MAN! HE'S GONE INSANE! OH PLEASE... GAAAHHH! HE'S COMING!' her mind yelled and she darted off around a corner and out of sight of the monster her master had become.
"COME BACK DEAR!" Filch yelled in despair. He quickly mopped the puddle up, threw the mop down and hobbled after Mrs. Norris. "I'LL DRY YOU OFF!" he called and looked around for her but couldn't find her. He heaved a heavy sigh and hobbled off to the dungeons, 'she will come back...'
Meanwhile...
Now that Filch was distracted, Ari snuck into the Potions classroom since she knew Severus wasn't in there and added random ingredients to his cauldron. She watched and sniggered as they turned into a thick, black ooze and expanded, overflowing the cauldron and oozed all over Severus' desk. Quite pleased with herself, she skipped out, before Severus returned, to cause more chaos about the school.
Severus entered his classroom, just to have a break away from the cat wailing and students screaming all over the place. "WHAT THE!" he yelled in disbelief, his eyes popped out of his head. He flicked his wand at the cauldron in hope of it reverting to normal, trying to stop the black smoke that was now forming. 'Ari...' he thought. When he realized his trying to revert it to normal didn't work, he tipped it out, knowing he had to start again. As for the rest of the mess, he lazily flicked his wand, 'Scourgify.' Once the last of the ooze in the cauldron and on his desk disappeared, he nodded and went back to business of brewing a new potion for his next class.
Meanwhile...
Mrs. Norris sat behind a classroom door, licking herself clean, 'Master... he's mental... the blithering idiot... where is he anyway? Probably gone back to his lair to hunt me down... well I'll show him...' she muttered bitterly in her head as she licked her paws, to others, innocently. She was really looking down at them, admiring them. She finished her moment of paw-gazing, stood to her feet, stretched a bit and walked off towards her master's lair; known to others as the dungeons, she sat at the dungeon door and meowed sweetly.
"Mrs. Norris? My sweet..." Filch said softly. He walked towards the door and opened it. He looked down at her and smiled.
'OH MUFASSA! THOSE TEETH! KILL THEM WITH FIRE!' her mind yelled frantically. 'Not my tail! THEM! OH MUFASSA... PLEASE... DON'T LOOK AT ME LIKE... LIKE THAT!' her mind flashed a scene where he could kill her just by him grinning at her; perhaps he was the real reason she was petrified a few years back? She raised her paw and scratched his leg with it as hard as she could. "REEEEEEOOOOWW!" she hissed and gave another low growl, 'That's for tormenting me with... with everything! You mad lunatic!' for each thought Mrs. Norris had, another deep scratch would appear on Filch's leg. Mrs. Norris wasn't going to let up, every time the man flinched, she would scratch him again. 'Whoever you are... GET OUT OF HIM!' with this thought, she gave him one final scratch and made sure it counted for something. "BREEEEEEOOOOWWW..." she gave another low warning growl as Filch flinched.
"YAAAAARRRR!" he yelled as she gave one more final blow to his leg, "Stop!" he yelled, raising his hand at her in attempt to stop her from scratching him.
Mrs. Norris' eyes widened, 'PIRATE! HE'S A MAD PIRATE!' without a second thought, she leapt over his shoulder, jumped to one of the statues and scrambled to the top of it. 'He won't reach me here!' she thought to herself and crouched low, watching Filch.
Filch's eyes widened as the cat leapt over his shoulder, "What the!" he yelled, startled. He looked around wildly as he noticed the cat was nowhere near him. "Mrs. Norris?" he cooed, clicking his fingers. "Where are ya?" he crouched low to the ground, "Here dearie... come out my love." he sneaked around the statue, still clicking his fingers as he searched for his beloved cat. "Come on..." deeply he worried; he wondered whether she'd run away. His voice shook slightly.