As Pansy headed in the direction of the prefect's cabin, one of the doors slid aside, and Hermione Granger (clad, as expected, in pristine prefect dress, though she had probably just changed - as usual, overeager to exult in her new power and prestige) stepped out just barely in front of Pansy.
Without breaking stride, Pansy grabbed Granger by the waist, and neatly twisted, depositing Granger to Pansy's side (and decently out of the way). Granger, startled, had managed an awkward sound that reminded Draco of a chicken squawking. He forebore to comment on that, however, as Pansy flung open the door to the restroom.
Draco Malfoy slid to a graceful stop, looking sidealong at Granger, "Cast the strongest silencing spell you can, won't you luv?"
Without waiting for a response, Draco Malfoy strode along towards Pansy, deftly shutting the bathroom door behind them both, although it was undoubtedly crowded in there.
As for Hermione Granger? Well, it was undoubtedly fortunate for him that Malfoy hadn't actually waited to hear Granger's scorching response. Her burning eyes and stiff-stalking gait showed everything about her sudden fury, as she strode over to the lav.
As if it was ice crystallizing over water, Hermione's visage turned calm, as she smirked deviously. Her wand instantly in her hand, she started to cast her very strongest silencing spell. Malfoy wouldn't know what hit him.
Still enraged enough to stalk back to her own cabin, Hermione's face had a markedly devious grin on it. "Hey guys, you'll never guess what I just did!"
As she relayed the story, Hermione grinned at her friends, "And the best part is? He asked for it!"
Pansy impatiently looked Draco Malfoy up and down, drawling in that obnoxious tone she favored, "If you're done thoroughly convincing the mudblood that we're going to have intercourse in the public restroom, on the Hogwarts Express..."
Draco Malfoy turned big innocent eyes towards Pansy (though truth be told, they hadn't worked in years.), "Yes?"
Pansy Parkinson shrieked, and the lav reverberated with it, as Hermione's silencing spell did its business. Deafened, Pansy continued even louder, "You can tell me exactly what happened. I want all the details!"
Draco Malfoy couldn't hear a word, of course, and he had his wand in his hand, running quick diagnostics, and trying to heal the split eardrums. Pansy, meanwhile, was earnestly trying to erase the blood from their garments. Draco didn't mind, she was always the expert when it came to fabrics.
[a/n: Show of hands: Who was expecting that? Seriously, leave a review, and I'll get into what Draco tells Pansy.]