[Neville Longbottom is sitting through his first DADA class of fourth year, listening to the new
mildly alarmingprofessor, Mad-Eye Moody]
Moody: Now, can anybody tell me another Unforgivable curse?
[The entire class, including Neville himself, is shocked when he raises his hand.]
Neville: Well, there is one…
[Moody stares at Neville for what starts to feel like an uncomfortably long time before breaking the silence]
Moody: … Longbottom… Isn’t it?
Barty Crouch Jr: … Who do we have here?
Barty Crouch Jr: … Longbottom… Isn’t it?
[Moody proceeds to take a large spider out of a jar and places it on Neville’s desk, pointing his wand at it]
[Neville watches in horror as the tarantula writhes and twitches in apparent and excruciating pain]
Hermione: Stop it! Can’t you see it’s bothering him?? STOP IT!!
[Moody places the spider, still twitching, back into the jar, and turns to address the class]
Moody: Pain. You don’t need thumbscrews or knives to torture someone if you can perform the Cruciatus Curse….That one was very popular once, too.