Harry Potter and the Nightmares of Futures Past/Funny

"Luna:"
 * Luna's Brutal Honesty about  is made of this. For example, Luna doesn't understand aerial tag.

"Hermione: What if you get struck by lightning?
 * From Chapter 38, Luna produces a Patronus...in the shape of a duck-billed platypus. When Ron congratulates her on having an imaginary animal for a Patronus, Hermione tells him that no, it's actually a real animal. He doesn't believe a word of it. Luna is completely straight faced, but Harry laughs so hard he almost passes out.
 * From Chapter 27, "This ponce is Voldemort?" What makes this even more hilarious is that it's Ron who says it.
 * From Chapter 34:

Ron: Hope the broom doesn't explode between your legs?"