CHAPTER 7

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"OK, we've got the potion in this flask, our wands in our pockets, not in the back, right? And... the spell is written here..." Remus muttered under his breath as the other three tried to stay awake,
"Moony, just because you get to sleep the entire day because of your problem doesn't mean we can!" Sirius complained half-heartedly as he looked at Remus bustle around the dorm, "And what did you wake us up for? You usually let us sleep..."
"You told me to wake you up," Remus said calmly, "Today is the day we do out hair prank!"
"Oh, Yeah!" the three boys sat bolt up right and started scrambling around, fighting over the bathroom and trying to get dressed at the same time.
After 30 minutes of complete chaos and confusion, the four boys arrived at the great hall.
"James, you have the thing to play music?"
"Yes,"
"Sirius, you have the shampoo?"
"Of course,"
"All right, let's go,"
The four of them strode in the Great Hall, robes billowing behind them from an unknown gust of wind,
"Cut it our, Creevey!" and the blonde boy scrambled out, tugging the fan that had created the gust of wind.
"OK,"
Remus took the flask of green potion, and opened the flask so the green fumes will float out, cast a invisibility charm, and James hurtled it towards the Slytherin table so they can smell it. Remus had cast a spell that makes it only affect Slytherins, hence the green color, the Slyherins doesn't seem to notice anything and continued eating as the flask landed on the middle of the table and green fumes started spreading.
"It's working, they didn't see it,"
But the other houses did, they pointed at the Slytherin table, but they did not seem to be disturbed by the pointing and murmuring, but continued eating. After James is sure that the whole Slytherin house had smelled the fumes, he nudged Remus, who ducked under the table and murmured the spell.
Nothing happened, then James hold out a muggle music player (boom box) and pressed play, and suddenly, the Slytherin's hair are all standing up and waving towards the sound of the music, all the other houses erupted into laughter, the Slytherins looked up, looked at each other, but didn't seem to notice anything, so continued eating, assuming that they are laughing at something they couldn't see.
The girls all looked quite funny, with their long hair sticking straight up and waving softly to the romantic music playing from Sirius's pocket (he shrunk the boom box), and the effect is less obvious on the boys, except for the few who has longer hair. Lucius Malfoy looks very funny, with his long hair sticking out and waving slowly, but Snape's looks even funnier, the grease in his hair prevents it from sticking up all the way, so only about half is sticking up, but not waving, due to the grease restraining it.
"Ewww... Look at Snivellus's grease suspending in the air..." Sirius wrinkled his nose, along with quite a lot of people, mainly girls, "James, play a faster song and we'll wash Snivellus's hair,"
James rummaged around and finally found the button to play, he quickly changed it into a quick song with a South American or Brazilian feel to it (try imagining the FIFA Waka Waka song). And all of the hair started standing at full attention and waving around, their owners oblivious of it.
The three boys sprinted across the Great Hall to the Sytherin table (Peter's eating), and James shot water out from his wand while Sirius emptied the whole bottle of shampoo on Snape's head,
"Potter, Black, What are you doing?"
"Don't worry, we're doing you a favor,"
Then, with a disgusted face, wearing dragon hide gloves, Sirius started smearing the shampoo all over the hair, which is waving to the music,
"You own me big time, Prongs,"

For Snape, it is very weird, for he can't feel the shampoo at all, for him, it's like Sirius is lathering up empty air with shampoo, yet the soap suds seems to stick in place,
"HOLD YOUR BREATH!" James is kind enough to shout a warning before drenching Snape in water, "You're welcome, bye!"
And the three boys sprinted out of the Great Hall, with Peter struggling to keep up with a piece of toast in his mouth and a fork pierced through a sausage in his hand.

A/N - finally, you know about the prank! This prank is the suggestion of Ranma's girl1.

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