The use of it on a student is, regrettably, forbidden. However...

Professor Dumbly-dorr, my horses have traveled a long way.

Keep everybody in their seats. A boy has just been killed.

Run along and play with your chemistry set!

Astonishing what a few drops of your blood will do, eh, Harry?

I will not have you, in the course of a single evening, besmirching that name...

- My father was a great man. - Your father was a swine.

A bezoar is a stone taken from the stomach of a goat and it will save you from most poisons.

...between an Animagus and a werewolf?

He was a big supporter of...

The blood that runs through these veins runs within the Dark Lord.

Earlier today, Professor Moody placed the Triwizard Cup deep within the maze.

- Illuminating? What a load of waffle. - What's it mean?

Augustus Rookwood? Of the Department of Mysteries?

Put your hands up in the air

Out for a little walk in the moonlight, are we?

...be doing inside on a day like this?

...asphodel and wormwood make a sleeping potion so

I told Dumbledore you were helping a friend into the castle. Here's the proof.

That would be a cheerful visit. "Hello, Hagrid.