Hermione Granger: She's only interested in you because she thinks you're the Chosen One.
Harry Potter: But I AM the Chosen One.
Albus Dumbledore: Take my arm. That was fun. Most people vomit their first time.
Dumbledore: Oh, to be young, and to feel love's keen sting.
Hermione: Excuse me, I have to go and vomit.
Ron: [Talking about Lavender] All she wants to do is snog me. My lips are getting chapped. Look!
Harry: I'll take your word for it.
Hagrid: Seriously misunderstood creatures, spiders are. It's the eyes I reckon. They unnerve some folk.
Harry: Not to mention the pincers.
Arthur Weasley: Times like these, dark times, they do funny things to people. They can tear them apart.
Ron Weasley: I'm in love with her!
Harry Potter: Alright. Fine. You're in love with her. Have you ever actually met her?
Ron Weasley: No. Can you introduce me?
Harry Potter: Professor, you knew Voldemort. You were his teacher. What was he like?
Horace Slughorn: Dumbledore put you up to this, didn't he?
Albus Dumbledore: Once again, I must ask too much of you Harry.
Harry Potter: Did you know, sir? Then?
Albus Dumbledore: Did I know that I just met the most dangerous dark wizard of all time? No.
Albus Dumbledore: You must be wondering why I brought you here.
Harry Potter: Actually sir, after all these years I just sort of go with it.
Chosen answer: Snape wants to know how Harry knew Sectum Sempra. As shown by him using Occumelancy to see where his copy of Advanced Potion making is. But at the same time, if Snape punished Harry for a spell in a book, Harry could show it to Dumbledore, who would recognise Snape's handwriting. Additionally, Harry was certainly punished in the book - he got detention with Snape every Saturday for the rest of the term. The movie most likely had to cut this for time issues, and also perhaps because the scene is more dramatic if Snape only silently glares at him.
Ssiscool