The scene from Shrek where Donkey meets the Dragon, but with some random guy and Alcor:
Guy: Oh, what large teeth you have!
[Alcor Growls]
Guy: I mean, white sparkly teeth! I know you probably hear this all the time from your food, but you must bleach or something ‘cause that’s one dazzling smile you got there! And do I detect a hint of minty freshness?
[Alcor Stops Growling]