He's Not a One-Eyed, One-Horned, Flying Purple People Eater?

After stealing the supplies from Professor Snape's private laboratory, Draco skipped his last two classes to brew the perfect prank.

He laughed evilly to himself while attempting to read the instructions. They were from a very old book that he had stolen from his fathers library back home, and was nearly unintelligible because of all of the food and ink stains on it.

"My father really is a slob," Draco muttered to himself. "I can hardly read this--I only hope it doesn't send Potter to an alternate universe or something... although that would be okay too, as long as it doesn't do any physical harm to him.."

He went on adding ingredients, reading the book as well as he could. "Is that one bat tooth, or two?" Draco squinted, examining the page quickly before adding three bat teeth. "That looks good."

The potion turned a deep purple color, with orange swirls, and Draco took it off the fire to cool. As it did so, he quickly brewed a simple invisibility potion and anti-potion, and swallowed the first one quickly. Then he hurried to the Great Hall with the purple potion and carefully snuck over to the Gryffindor table.

Harry had his pumpkin juice sitting at his right elbow. Seamus had just fallen off his chair laughing at Dean for blowing soap bubbles--Apparently Seamus had spiked Dean's juice with soap. It was a simple matter for Draco to lean in and pour the orange and purple mixture into Harry's pumpkin juice.

He was surprised when no one saw the purple and orange liquid being poured from an invisible container. He couldn't believe that he had forgotten to turn the potion invisible--but since everyone was laughing at Seamus and Dean (and it was quite funny,) no one noticed. Close call.

Draco quickly hurried out of the Great Hall and went to a secluded alcove. Once there, he swallowed the anti-invisibility potion, and watched as he started to become visible again. It was an odd feeling--it felt as if a million pins were pricking him everywhere simultaneously.

Visible again, Draco hurried back to the Great Hall. He was eager to see the effect his potion had on Harry.

When he got there, he found everyone crowded around the Gryffindor table, staring at the floor. With a gasp of worry, he wormed his way through the crowd and watched as Harry finished his round of convulsions.

"Oh shit." This wasn't supposed to happen--he didn't think.

Harry smiled dreamily. "I see flying bunnies! And swimming birdies! The fish are hopping!" Then, the Saviour of the Wizarding World passed out.

Shit. He definitely wasn't supposed to pass out. In fact, Draco was almost positive that Harry wasn't supposed to be going into convulsions, or seeing birds, rabbits, and fish, either.

Damn his father for being sloppy. Damn his father for eating over rare and priceless books. Damn his father for demanding that Draco do something, anything to Harry this semester.

Because he had. And it had backfired.

Draco hadn't seen many, but he knew that Harry didn't quite look like a one-eyed one-horned flying purple people eater.

Oh. Shit.