challenge #3 (1.12.06) : Snape, Harry. "Do you know what this is, Potter?" Snape said, his eyes glittering dangerously again.

"Do you know what this is, Potter?" Snape said, his eyes glittering dangerously again. Harry gave Hermione a panicked looked, that was instantly intercepted. "Don't even think about it Ms. Granger." Snape refocused his glare on his least favorite student. "This is your potion is it not?" Harry nodded nervously. "Then presumably you know what this is?" He waved the rather terrified grey and white guinea pig at Harry.

"Um, it's Neville?"