VIZZINI: I suppose you think you're brave, don't you?
BUTTERCUP: Only compared to some.
Aw, snap. This is such a great line, because Buttercup not only answers Vizzini's question in the affirmative, but in doing so demonstrates the very trait she's being accused of. It has to take guts to talk like that to someone who has taken you prisoner and has ready access to a supply of bladed instruments.