Disclaimer: This all belongs to J.K. Rowling, not me.
Professor Snape was in his normal, foul mood as he scowled at the class. Although they were fifth years, they were the biggest lot of dunderheads he had ever taught. "For homework, you will all write ONE drabble about the uses of wolfsbane" he informed the class.
A boy with white-blond hair lazily raised his hand. "Yes, Mr. Malfoy" Snape called on his favorite student.
"What is a drabble, Professor?" Malfoy asked, confused with the strange word. Snape scowled. Of course the students didn't know what a drabble was. He looked around the room, and as usual one student had her hand waving wildly in the air.
"Do you need something, Miss Granger" Snape sneered at the female third of the Golden Trio.
"A drabble is a short piece of writing of exactly 100 words in length" Hermione said in a matter-of-fact voice.
Snape glared at her words. Hermione felt his searing gaze, but she resisted the urge to shrink from his stare. "I didn't ask you. Though I daresay you will be capable of writing something as concise as a drabble. Five points from Gryffindor."
"But Professor" Hermione protested.
"Make that ten" Snape replied.