When it comes to the dark arts, I believe in a practical approach. First, which of you can tell me how many unforgivable curses there are? - Three, Sir. - And they are so named? - Because they are unforgivable. The use of any one of them wi... - Will earn you a one-way ticket to Azkaban, correct. Now, the ministry says you're too young to see what these curses do, I say different! You need to know what you're up against, you need to be prepared. You need to find another place to put your chewing gum besides the underside of your desk, Mr. Finigan.
— Harry Potter and the Goblet of Fire
by Mike Newell