If you had told Ron Weasley, after his first journey on the train to Hogwarts, that he would marry that Insufferable Know-It-All Hermione Granger.
"Are you outta your mind? Why? Why the hell would I marry…? No. No! NO! Never. Never. Why would you say this? What kind of twisted person would say that? Why? You're an idiot, aren't you? You're deluded! Demented! You have been hallucinating. Imagining that I would get married to that… that… show-off!
Okay, these are short, but you try writing them!