Harry Potter and the Half-Blood Prince or Rocky?

Are you a fan of Harry Potter and the Half-Blood Prince? Of Rocky as well? Prove it! Select which quote belongs to which movie and see how good you are:

- It's Thanksgiving.

- Yeah, to you it's Thanksgiving; to me it's Thursday.

- Why is it, when something happens, it is always you three?

- Believe me, Professor. I've been asking myself the same question for six years.

- Why do you wanna fight?

- Because I can't sing or dance.

- Has it ever crossed your brilliant mind that I don't want to do this anymore?

- Whether it has or it hasn't is irrelevant; you gave me your word.

- Hey! She's only interested in you because she thinks you're the Chosen One.

- But I am the Chosen One... Sorry... kidding!

You're gonna eat lightnin' and you're gonna crap thunder!