My current favorite comes from the first season "Clone Wars" DVD. Assaj Ventress has just defeated all contestants in an arena and makes a claim to be Sith to Count Dooku. Dooku finds this amusing and points out that, basically, while she LOOKS like a Sith she isn't a Sith, because the Sith knew no fear, "And I sense much fear in you." (echoing Yoda's comments to Anakin, interestingly enough).
To which Assaj retorts, sneeringly, "You are a foolish old man who knows NOTHING of the Dark Side!"
One can tell that this both amuses Dooku, annoys him, and perhaps startles him by its sheer WRONGNESS. Which he of course proceeds to demonstrate rather conclusively to poor Assaj Ventress.
So, what examples of this do y'all have that come to mind?