A series of cheerful events
"That's it!" Harry shouted, still reeling from snape's occulmens lesson.
"Behave yourself, Potter." Snape turned, and was too busy imagining the interesting shades of color that his griffindor counterpart would turn when she saw just how few rubies were left in the race for the house cup, and if they would turn green if he took away enough, failed to notice Harry raise his wand, and had no chance to dodge the barrage of spells that flew his way.
"Duuuuuuudeeee, who wants to make some firewhiskey?" The potions master drawled.
The class was utterly still and silent, unable to comprehend the event for several seconds. Then the dungeons rocked with their cheers.
McGonagell cocked her head.
"Oh, dear, it looks like Severus finally snapped and started killing the students- ha! Albus owes me ten galleons! And I guess that I should probably go save them.
Hermione walked up to Harry.
"Okay, what did you do?"
"Me? I'm the picture of innocence here, what makes you think that I have anything to do with this, when he probably just discovered what brothels are for?"
"Who else would do it, now that the twins are gone?"
"Well, there's always Lee, or peeves, and-"
"Plus, you look like the cat that got the canary."
"Well... Okay, I might have hit him with a few... Dozen permanent cheering charms, then sent him to a veela community over the weekend."
Hermione was torn between hitting him, hugging him, an pulling him into the nearest closet.
However the rest of the class that over heard them, sans the amazing ferret-boy and bookends, and Ron, who were all to stunned to move, descended on him to do some combination of the latter.
Meanwhile, snape hugged a crying Neville.
"Get him alway from me!" Umbrige cried as the toadly woman ran trough the great hall.
"Duuuuuuuuude, I just want to hug you, spread the love, maaaaaaan."
"That's it! Damn this creepy place, I quit!
There was utter silence as the two left the room, then- three cheers for potter!
They all descended upon their hero, the-adolescent-who-vanquished-the-dark-git-and-hid -large-toad-too.
Meanwhile, Neville, emotionally scarred from his earlier hug, proceeded to send the slytherin trio to the long-term care ward at saint mungo's.