You were in your first year, and you and your friends, Harry, Ron, and Hermione had unlocked almost all of the secret about the Sorcerer's Stone. You knew it was made by Nicholas Flamel, and Nicholas had asked Dumbledore to keep it safe at Hogwarts. Your friends also suspected that Snape was trying to steal it.

That day, you actually had a missing assignment you needed to turn into Professor Snape. You knocked on the door to the staff room, where he was sure to be, paper clutched in your hand. When no one answered, you peeked open the door...

... Inside, was Snape, robes pulled up so that Filch could clean the bloody mangled mess of a leg he now sported. Your eyes widened. It could be a souvenir from no other than Fluffy. The giant three headed dog... That guarded the Sorcerer's Stone. A small squeak erupted from your mouth and both men swiveled to look at you, Snape quickly covering his bloodied leg with his robes once more. "I, uh. My missing assignment?" You held up the paper timidly, then jumped. Professor Snape had started screaming at you. "GET THE HELL OUT OF HERE! OUT!" You jumped at his tone, abandoning your sheet of paper, bolting down the corridor.