Vader "When last we met, I was but a learner. Now I am the master."
Obi-Wan "What about that fight we had nine years ago? You were pretty damn impressive then."
Vader "Oh yeah, I nearly forgot about that one. You were pathetic then."
Obi-Wan "Hey, at least you stood around while I got away. Thanks, mate."
Vader "Yeah, well, there was fire. I'm a little nervous around fire since you... burned my limbs off and left me for dead."
Obi-Wan "You did that to yourself. I warned you, I had the high ground!"
Vader "... Now you will die, Old Man!
Obi-Wan "Strike me down, Darth, and I will become more powerful than you can possibly imagine!"