(Side note – the wizarding world has been keeping up with technology. Smart phones exist in Hogwarts but there is no wi-fi or reception. Rumour has it that there is a room somewhere in the castle that will provide you with Wi-fi if you ask for it, but nobody has succeesding in finding it yet.)
Scott and Stiles are on their way to Care of Magical Creatures when Stiles spots Derek inside one of the Potions labs. He throws out an arm to stop Scott in his tracks.
"Dude, it looks like someone's jinxed him!"
Derek is lying on the ground, stiff and unmoving. Scott and Stiles hurry into the room and Scott tries to reverse the jinx, to no avail. The only part of Derek that can move is his eyes - they are wide and, as per usual, angry.
Stiles looks at the desk next to them. A clear, gooey liquid has spilled out of the cauldron. "Hey, what's - oh. Uh oh."
Derek groans and rolls his eyes when he realises that the ones to find him, out of the whole fucking school, are Stiles Stilinski and Scott McCall. He watches as they try to reverse a jinx (seriously? His spilled paralytic potion was right there, and they thought someone had jinxed him?).
Then he watches Stiles approach the bench. Please, for the love of God, don't touch the fucking potion, Derek thinks, glaring daggers at Stiles in the hope that he will get the message.
Of course he doesn't.
Stiles collapses right on top of Derek, a sheepish expression frozen onto his face. Derek really doesn't need the feeling of Stiles's muscled chest against his to be added to his dream repertoire, so he passes the time by imagining all the ways he can kill Stiles once they're out of this ridiculous predicament.
Scott manages to stop laughing his ass off for long enough to catch the murderous look in Derek's eyes.
"Oh, right, sorry," he grins, and reaches down to roll Stiles off Derek's chest. Now they're lying side by side, and it looks as if they're holding hands. Scott is still doubled over laughing when Professor Harris, the Potions master, walks into the classroom. That shuts him up.
"What the devil is going on here?" Harris sneers down at Stiles and Derek before turning to Scott for an answer.
"Uh - oh, man, um, well, I think they touched some of that stuff - here, on the bench - and it paralysed them or something?" Scott offers politely, his mouth twitching with the effort of not laughing.
Professor Harris takes a look at the goo on the table and gives a long-suffering sigh.
"Hale's Potions homework, I expect."
He nudges the two paralysed teens with his foot.
"You two degenerates are lucky I already have the antidote brewed. You will both attend Thursday detention for a month for wasting my time."
Harris rolls his eyes dramatically and stalks off to get the antidote from his personal storage cupboard.
Scott watches him go before turning back to Derek and Stile and cracking up again.
"Oh man, this is just too good," he giggles.
And he takes out his phone and snaps a picture.