Picking up the thread, A Dare Options

[zymurgy]

... Mr. Weasleys car. With a bit of complex manouvering involving the windshield wipers, the rear view mirrors, and the front door, the car managed to slam the ball of string into the front seat.

With a varoom the car roared through the forest path, destroying a web, annoying a centar, and confusing a bevy of fairies.

Finally, it reached it's destination - Hagrid's hut.

Throwing one of its doors open, it tipped, letting the ball of string roll out onto the ground.

It honked its horn to signal delievery, flashed its lights, then roared out of sight once more.

The ball rolled a short ways, as it was covered in rather sticky spider web that prevented it from getting very far. It did, however, manage to get far enough to ...

[McGonagall's Cat]

...stick to the sock of Cho Chang as she rushed from class to Quidditch practice.

It managed to hold without her notice until she reached the entrance to the Pitch. The rest of the Ravenclaw team was emerging from their locker room, already dressed, carrying their equiptment.

Roger Davies shouted, "Yo! Chang! What's that on yer foot?"

She glanced down, recognized the String of Doom and let out a shriek, kicking her leg as hard as she could to dislodge the offensive thread.

It flew high into the air, eventually falling....

[entr'acte]

...

into the Owlery. The owls (annoyed at being awakened so early in the day) hooted their annoyance and promptly went back to sleep. The ball of string lay on the floor until a gust of wind blew threw the windows and caused the ball to start on it's way...

down the stairs...

out the door...

and directly into the path of...

[zymurgy]

...Ernie McMillian

"I say," he said dramatically, gingerly tapping the disgusting thing with his foot, "'tis the Ball of String of Doom! Must be a tangled plot of the Dark Lord, or some new madness of Harry Potter - or even something the Professors thought up to test our minds ... Our obvious course, for the good of our house, is ... "

His house mates waited with baited breath for instructions involving gallantry, for words of great wisdom and profundity, for some amazing revelation.

"... to clean it," finished Ernie. "SCORGIFY!"

Of course, as we know, casting spells on the string of doom has rather nasty effects- to be sure, the string became clean. But it did so by flinging all the dirt it had accumulated into poor Erics face, propelling itself in the opposite direction.

"Ernie! Are you ok?" his housemates yelled, rushing up and trying a barrage of cleaning and healing spells, which eventually fixed the problem. Of course, before they managed to fix anything, they'd removed and reattached his eyebrows once, misplaced his nose on his foot and replaced it, and once even lost track of his left arm altogether and had to Accio it back. Even more oddly, the entire process was entirely bloodless.

In all the screaming and confusion, nobody noticed that the Ball of String of Doom had hit ....

[Azgard]

Professor Snape, who happened to be in a rare good mood after having caught that little Know-It-All-Granger attempting to skip class. He chuckled to himself as he thought 'Actually, it wasn't a lie, but no matter, she got what she's -'

"Whom ever is taping my shoulder had better have a very good reason..." he warned in a deadly whisper. The ball was somehow supporting itself on it's own string and randomly tapping Snape on the shoulder.

Snape turned around and attempted to curse the witless student he assumed was behind him, but the curse rebounded back on Snape knocking his wand out of his hand and he found himself tightly bound in string from his shoulders to his ankles. Caught unawares as he was at this development he toppled off his feet onto the floor.

All Snape could do was to watch the ball bounce away to...

[timeturner]

...Draco Malfoy, who picked it up to examine it closely.

"What do we have here?" Draco drawled.

Crabbe and Goyle exchanged a silent, but exasperated look. They knew what was coming next.

"Ah, the String of Doom. My father told me all about this," Malfoy bragged.

"Who cares," Crabbe mumbled under his breath.

"What did you say, Crabbe?" Malfoy snarled.

Crabbe started, "Uh...I said blue hairs."

"Blue hairs?" Malfoy questioned, a note of skeptisism in his voice.

"Er, that's right. Blue hairs."

Malfoy continued to look suspicious causing Crabbe to panic. He looked to Goyle for help, but found none as Goyle had been distracted by a shiny button that was glittering within the grass. Crabbe looked around, growing more desperate by the second. That's when he saw his out.

"Blue hairs. Right there!" Crabbe pointed excitedly into the distance.

Malfoy turned his head to follow Crabbe's thick finger and dropped the ball of string. It rolled directly under...

[Azgard]

It rolled directly underneath the invisibility cloak from under which Harry Potter was busy observing the Ravenclaw Quidditch practise.

All of a sudden the one bludger that was being used in practice came flying at Harry, causing him to try and dive to the side, away from the bludger. The Ball of String of Doom caught under his foot caused Harry to slip sideways instead and kick the ball way up in the air, where it...

[lupinsmyman]

…Ravenclaw Quidditch captain, Rodger Davies squarely in the head. It wound around his broom, trying to pull him down.

“It’s that bloody string of EVILNESS!” he yelled trying his best to keep his balance.

By now other members of the team were trying to help Rodger fight the string. A third year flew underneath him. When he tried to grab it, the ball unwound and fell to the earth right beside…

[timeturner]

...Hedwig, who had paused on the ground to readjust the letter that was tied around her leg. With a slight roll of the head, Hedwig investigated the ball of string. She hooted imperiously and decided the time had come to dispose of the infernal ball of doom. Stabbing it with her beak, she lifted the ball and herself into the air.

Unfortunately, the banishment of everlasting doom was not to be. Hedwig accidentally dropped the wad of string just as she was flying over the castle's courtyard. It sailed through the air and landed...

[entr'acte]

.. directly on top of Madam Pince's hat. This was one of the rare occasions when she actually stepped out of the stuffy confines of her library ("Stuffy! How dare you! Come back here you nitwit!" - Madam Pince)

She strolled across the courtyard, having not noticed anything. Many of the students were peering at her most curiously, but she attributed that to the fact that none of them had ever seen her step out of the castle. Well, obviously, they never really paid attention to the librarian.

"Er." Madam Pince spun around to see Professor McGonagall standing behind her with a curious look on her face. "Irma - ?"

"Well, out with it, Minerva," Madam Pince said. "Is my robe backward, my hat at an odd angle? Are my wretched dust bunnies following me again?" To herself she muttered, "Hmmph. I thought I'd taught them their lesson last time."

"No. No," said Professor McGonagall. She looked distracted and was staring into the space above Madam Pince's head. "It's nothing. It's just -"

"Good day, then." She tossed her head and continued to walk, her nose in the air. The String of Doom fell from her hat as she walked and bounced as it hit the ground. It then continued it's way, tripping a few unknowing students, one drunken house-elf, and nearly starting a fight between two unobservant first years. It then rolled into ...

[timeturner]

...Blaise Zabini's bookbag. Blaise had dropped the bag out of necessity just moments before. The red-headed Weasley girl, or BTW as he liked to call her, had lost her temper and jinxed him.

Blaise swore under his breath. He wasn't sure which hex she used, but his face felt very strange. Plunging his hand into his bookbag, Blaise felt around for his wand, hoping to perform a counter-curse before anyone spotted him.

Too late. Blaise heard someone screaming and recognized Pansy's voice.

"Aghhhh! Your face! Your face!" Pansy screamed.

"What's the matter with my face?" Blaise asked desperately, still scrambling to find his wand.

"It's...it's...inside out!" Pansy said, horrified.

Becoming more panicked by the second, Blaise dumped the contents of his bookbag onto the ground, not noticing that a ball of string had rolled out. The Ball of Doom rolled and rolled, finally coming to a stop in the middle of...

[McGonagall's Cat]

...the second year Herbology class as they raced back into the castle.

The Thread of Doom grinned malevolently. It wrapped around an ankle-sock clad leg and rode into the massive entryway, then spun off to wrap around yet three other passing feet and finally firmly attached itself to the nearest post of the House Points Hourglasses.

The string began to tighten. Shouts rang out as student after student tripped and fell. One landed against a suit of armour adding a resounding clanging to the chaos. Peeves came to assist, tossing water baloons at the already downed students. The Gryffindor Hourglass wobbled precariously as the Hufflepuffs tried to steady their own (since its crashing would be problematic due to us not knowing what sort of precious stones it holds).

Meanwhile the Ball gleefully untangled itself from the mess and rolled across the foyer into the Great hall where it......

[Amaranth]

...bumped gently against the highly polished shoes of Rufus Scrimgeour. The Minister's nose wrinkled as he detected a whiff of lake water and sweaty feet, causing him too look around for the cause of the horrid odour. He sniffed, his expression becoming more and more disgusted until he spotted the ugly ball of thread at his feet. He felt that he should really have a word with a headmaster about the state of cleanliness in the school, as it was clear to him that such an object as this ball of thread was most certainly a plague-spreading risk to health. Thoughts of gleaming environmental reports and disgraced headmasters began to swim through his mind as he pulled on a glove and reached down to pick up the offending object.

Sadly, it was at this moment that his assistant, Percy Weasley, came rushing into the Great Hall, bashing into the Minister and causing both of them to topple to the floor in a tangled mess of angry words and bruises. Sadly for the Minister, he was denied his environmental report, as his outstretched hand had knocked the ball of thread well out of reach and under one of the tables, where it...

[QuidditchChick]

...tangled around the shoes of a female ravenclaw student, who was previously enjoying her study of the phases of the moon.
"What in the world?" she exclaimed as she felt something tighten around her ankles. She set her book aside and looked under the wooden table. "EEEK!" she squeeled in shock at the sight of a dingy ball of string circling her feet. She kicked her feet in an attempt to get rid of the stringy pest. She grunted in frustration. Then she tapped the student next to her. "What do you think this is?" She tried to bring her feet around the bench to show her companion, but instead was tripped up by the naughty ball of string.
She picked herself off the floor, utterly embarrassed. She glared at the ball. It seemed to be staring at her, mocking her in silence. She shook with anger, and then, kicked the ball as hard as she could. It soared through the Great Hall until it landed...

[timeturner]

...on a robe. More specifically, a Slytherin robe which was being worn by one Pansy Parkinson.

Because she was so intent on getting to her next class, young Pansy Parkinson never noticed the ball of string that was attached to the back of her robes. She never noticed that it was covered in cobwebs and she especially did not notice that it had begun to unravel slightly.

It was unfortunate for Pansy that not all creatures were as oblivious as her. For someone had noticed the string. Noticed it, and coveted it. That someone was Mrs. Norris.

Mrs. Norris followed Pansy out of the great hall and up more than five flights of stairs. She waited for the girl to stop, but the girl never did. By the time they reached the sixth floor, Mrs. Norris realized that if she wanted the string, if she really wanted it, she would have to fight for it. And fight for it she did.

Young Pansy never knew what hit her. She was knocked to the ground, scratched, and bitten. It was mayhem at it’s finest.

Lost in the shuffle was the ball that had started it all. In her desperation, Mrs. Norris had inadvertently kicked it down the corridor. It rolled….