Harry Potter and the Goblet of Fire2005

[Crouch has just finished his Imperius Curse demonstration on an enlarged spider by sending it flying around the classroom]

Crouch (as Mad-Eye):
Scores of witches and wizards have claimed that they only did You-Know-Who's bidding...under the influence of the Imperius Curse. But here's the rub: How do we sort out the liars? Another, another. [Students begin to raise their hands] Up, come on. [Neville slowly raises his hand] Longbottom, is it? [Neville lowers his hand and stands up] Professor Sprout tells me you have an aptitude for Herbology.

Neville:
[Nervously] There's the, um, the Cruciatus Curse.

Crouch (as Mad-Eye):
Correct! Correct! Come, come. [the spider comes back] Particularly nasty. The torture curse. [Aims his wand at the spider] Crucio!

[The spider makes a terrifying squealing sound, seriously bothering Neville, who is watching it up close]

Hermione:
Stop it! Can't you see it's bothering him?! Stop it!

Crouch (as Mad-Eye):
[Releases the spider from the curse; Walks over and places the spider on Hermione's desk] Perhaps you could give us the last Unforgivable curse, Miss Granger. [Hermione shakes her head] No? [Points his wand at the spider] Avada Kedavra! [The spider falls, unmarked but dead. Harry is watching from a desk across.] The Killing Curse. [looks at Harry] Only one person is known to have survived it...and he's sitting in this room.