We had a favorite movie quote thread a little bit ago, so instead I will give some of my favorite exchanges between characters.
While I did not really like the movie, the scene between Steve Martin and Bill Murray in "Little Shop of Horrors" in the dentist office was priceless.
The "My Cousin Vinny" exchange when Joe Pesci Has Marisa Tomei on the stand makes me laugh to this day no matter how many times I have seen it.
Tom Cruise putting Jack Nicholson on the stand in "A Few Good Men".
And, letting my "inner-Geek" out to play: Yoda and Luke in my fav movie ever: "The Empire Strikes Back".