Hey everybody! I've been thinking a lot about this, so I'm posting it now. Also, I'm taking suggestions for any other pranks from the twins, if you you have suggestions and don't mind me using them!

ILY

~Phantombookworm

George peeped out from the statue as he heard footsteps approach. Recognising his brother's gait, he stepped out from the niche. "Great Merlin, what were you doing? You took ages!"

His brother shrugged, and handed over the carton of powder and the shrunken box of planets. "It took me a while to get the sequence right again. You keep changing the password." George noticed the way he smiled, and the rueful way he straightened up, as if his back was bruised. Password took ages, my arse.

He raised a disbelieving eyebrow but decided to let the matter drop. "So, in about five minutes, the lesson's going to start…"

The twins snuck into the Divination classroom and huddled in the shadows at the back of the room. Next, the fourth-years would be starting astrology, and Trelawney always started that particular lesson with a practical example.

As the bell went, Fred muttered a disillusionment charm- one that he had found whilst researching invisibility to avoid Filch, actually- and both he and his twin melted into the shadows just as the Ravenclaws started to climb into the stuffy classroom. Fighting back a laugh, he noticed how the contingent of Ravenclaws that believed in the dubious 'art' of Divination was so small that they shared a class with their Slytherin counterparts.

"Good day, my dears," a soft, mystical voice appeared from the gloom near the fireplace.

"Hello, Professor Trelawney," a few Ravenclaws murmured back. Enthusiastic, much? Fred thought, sharing a glance with his twin.

"Today we will be starting the esteemed and precise art of astrology." The murmurs stopped for a few seconds in the Slytherin corner, and then resumed. "Lights, please, Du Pree."

A tiny Slytherin boy stood up and slouched towards the light controls by the door. Before he could reach it, however, George threw a fistful of darkness powder into the air.

The muttering stopped.

"Thank you, Du Pree." Trelawney seemed oblivious to the fact that her room was now, in fact, pitch black. "There are nine planets in our solar system, which I know you have covered with Professor Sinistra…"

Fred raised his wand, muttered a swift "Engorgio," and then levitated the glowing planet-like orbs into the air. One by one, they started to spin.

"What is this?" A panicked girl screamed. "What is-"

Fred loved this part of the plan, because Trelawney couldn't say that it wasn't her, else she expressed herself as a complete fraud. And then that's where things get interesting.

"Don't worry." George's magically enhanced voice filled the room like a whisper. Everybody heard, except Trelawney. And nobody wanted to say that they had heard it.

Trelawney was trying to continue with the lesson. A tremor in her voice, she said "the closest planets to us are Mars and Venus…" The planets indicated started to grow alarmingly. "Mars is the bringer of war, hardship, conflict, and is commonly associated with fire…" She trailed off, her eyes wide in her oversized bottle-glasses, alarmed. And for good reason, as the 'planet' depicting Mars began to pulse red.

"Incendio."

The blaze that Mars gave out was quite astonishing, especially when you considered the dozen Filibuster Fireworks stuffed inside the orb. Sparks, tongues of coloured flame, and hailing showers of golden rain poured down, evaporating just inches above the heads of the students. Trelawney, standing up, was not so lucky.

"Aaargh!"

Her trailing scarves and the very ends of her hair were frazzled, sooty and slightly smoking. She collapsed onto a low armchair, and took a deep swig of what appeared to be house elf sherry, and hiccoughed, once.

"Next in the sequence we have Jupiter, named for the Roman God of thunder-" George's voice echoed around the room as thunder boomed, the storm rolling around the ceiling. The orb for Jupiter also grew in size, as George continued. "And the God of lightning," he added. Jupiter flashed once, brightly enough to sear the retinas so everybody saw stars, and then evaporated in another bright flash of gold.

"Ohhh…" The shocked response from the students made Fred grin.

The colour of gold spread through the room, as the darkness lifted and it seemed like there was now a large number of students on pouffes (and a slightly tipsy teacher) stranded in a large cornfield. "Saturn, the next planet, is named after the Roman God of farming…" A brisk wind blew through the corn. "He is also known as the bringer of old age…"

George raised his wand, muttering a charm. Suddenly, all the students and Trelawney sprouted long, white flowing beards, and their hair turned through grey to a silvery-white. Each of the students turned to each other, starting to laugh. As some of the larger students began to make fun of the smaller ones that seemed to now be wrapped in silver hair, Fred muttered a small jinx that turned their new locks into rather interesting colours and shapes.

"Oi, Du Pree! Nice silver mohawk, mate!" Tony MacGuire grinned at his friend.

"Joanne! Your hair- it's bright orange!"

The Weasley twins were now doubled up with silent laughter at the back of the room as the chaos around them continued. Trelawney now had bright pink sparkly hair to join her smoking shawls, and several of the Slytherins were now dancing around indignantly as their hair turned through a rainbow of colours, each as lurid and fluorescent as the next.

George spoke again.

"SILENCE." The classroom instantly grew silent, eyes watchful, and a new breeze echoed through the stone room. "As we continue our journey, next is the planet Uranus."

Several of the students- still with brightly coloured matching facial hair- sniggered.

"And just what do you think is so funny, Shane?" The boy shook his head, petrified of the voice, clutching his hands over his now Snape-like locks. "Uranus is named after the God of Magic…" a purple, twining fog filled the room. "He is also the God of the sky…" the room again, went dark, as the planet Uranus exploded into many tiny fragments that studded the darkness like stars, which arranged themselves into constellations.

"Wicked." A Ravenclaw murmured to her friend.

"Neptune, the God of water, the oceans, horses…" As George uttered those words, water seemed to fill the small tower room, the pouffes and armchairs now tiny boats on a wild sea. Several of the Ravenclaws started to look rather sick, and Trelawney was now a vivid shade of green, which clashed alarmingly with her hair. "Also known as a mystic, a man of magic." The facial hair disappeared from each of the students, but remained stubbornly attached to the face of the teacher. The colour faded from the hair, except instead there was an extraordinary amount of glitter. Every movement, and it cascaded down the shoulders of the student.

"Pluto, God of the underworld." Fred threw another handful of darkness into the room, but each of the students shone as brightly as beacons in the darkness, glittering like tiny constellations. An ominous creaking echoed on the stonework, and several students screamed. "He controlled skeletons, ghouls, and the undead." A skeleton paused just in front of Rosalie, who looked on the verge of collapse. Fred was just about to usher it onwards, until a streak of purple light hit it square on the chest. Looking back in the direction of the spell, Fred could make out a trembling outline of Nicholas Shane, wand outstretched. None of the others could see him, because of the darkness powder, but it was reassuring to know that Slytherins didn't just care for themselves.

Trelawney now stood, shakily. "A-a-and that is the e-e-end of t-t-that lesson, my d-d-dears." She collapsed against the cushions on her chair and took a deep draught of sherry.

Old fraud, Fred thought scornfully. She can keep the hair.

The students were now starting to fumble their ways to the trap door. One almost fell through it. "Optio," Fred muttered, causing a floating bulb of bright light to float above the trapdoor so no one broke their necks.

"Rosalie?"

"Nicholas?"

"Are you okay?"

"Thank you."

It was a civil enough conversation, but miles of meaning and concern lay beneath the surface. Nicholas was about to say something, when-

"Oi, Shane!"

He sighed. "Coming, Tony." He squeezed the Ravenclaws hand, and then hurried after his friend as he fumbled on the rope ladder.

Fred smiled, and his brother tapped his shoulder.

"That went well," George said, his voice returned to normal."

"Yeah," Fred replied, still watching the Ravenclaw girl, who was staring at the spot where Nicholas had vanished. He turned to his brother. "It went brilliant." Earned you back some, Hermione.