The fifth-year Slytherin/Gryffindor potions class was restless. An event many thought impossible was happening – Professor Severus Snape was late for class. The Gryffindors were whispering among themselves, shooting nervous looks at the classroom door. Hermione Granger was huffing impatiently, flipping through the textbook and rueing the rule against brewing potions without teacher supervision. Ron Weasley was engaged in a game of wizards chess with Seamus Finnigan, Dean Thomas and Neville Longbottom providing commentary while Harry Potter looked on silently.
The Slytherins were talking openly, most grouped around Draco Malfoy to hear of his latest extracurricular activity, which ended in a first-year Hufflepuff running off in tears.
As the noise level reached a crescendo, each student competing to be heard above the others, the classroom door banged open and Professor Snape stormed in, slamming the door shut behind him. "Everyone sit down and shut the goddamn hell up!"
Well that's all I've got so far. This idea came to me and it wouldn't go away so I had to get it down. I'll leave it as a oneshot for now but I might expand on it later.