Albus Dumbledore: Take my arm. That was fun. Most people vomit their first time.
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?
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.