“Yippee-Ki-Yay” — spoken by Bruce Willis in the original Die Hard — is not the greatest one-liner in action movie history, as Eric Lichtenfeld suggests in this Slate “Summer Movies” piece. In this context the word “greatest” would have to mean “most satisfying in a zingy, bull’s-eye sense.” Without question, the line that takes the cake in this respect is “Hasta la vista, baby” — spoken by Arnold Schwarzenegger in Terminator 2: Judgment Day.