Potter, what's your hurry? Congratulations. Your performance in the Black Lake was...

Professor Snape: Potter, what's your hurry? Congratulations. Your performance in the Black Lake was inspiring. Gilllyweed, am I correct? Harry: Yes sir. Professor Snape: Ingenious. A rather rare herb, Gillyweed. Not something found in your everyday garden. Nor is this. [holds up a bottle] Professor Snape: Know what it is? Harry: [sarcastically] Bubble juice, sir? Professor Snape: Veritaserum. Three drops of this and You-Know-Who himself would spill his darkest secrets. The use of it on a student is, regrettably, forbidden. However, should you ever steal from my personal stores again, my hand might just slip over your morning pumpkin juice. Harry: I haven't stolen anything. Professor Snape: Don't lie to me! Gillyweed may be innocuous, but Boomslang skin? Lacewing flies? You and your little friends are brewing Polyjuice Potion, and believe me; I'm going to find out why! [shuts the door in Harry's face]

Potter! What's your hurry? Congratulations, your performance in the Black Lake was inspiring. Gillyweed, am I correct? Yes, sir. Ingenious. A rather rare herb, gillyweed. Not something found in your everyday garden. Nor is this. Know what it is? Bubble juice, sir? Veritaserum. Three drops of this and You-Know-Who himself would spill his darkest secrets. The use of it on a student is, regrettably, forbidden. However... ...should you ever steal from my personal stores again... ...my hand might just slip over your morning pumpkin juice. - I haven't stolen anything. - Don't lie to me. Gillyweed may be innocuous, but boomslang skin, lacewing flies? You and your little friends are brewing Polyjuice Potion, and believe me... ...I'm going to find out why! - Yeah! - Yeah!