Thomas Gabriel: [Probing a gunshot wound in McClane's shoulder with his gun.] On your tombstone, it should say "Always at the wrong place at the wrong time."
John McClane: How about... [grunts.] Yippee-ki-yay... Motherfucker! [Grabs the gun and fires it through himself and into Gabriel.].
Just as McClane and Farrell are about to leave the Eastern Power Hub, Farrell goes on a long rant and his mouth does not match the words he is saying. [In the unrated version of the film, the rant concurs with Will's mouth movements, but the mistake is valid for the regular version.]
The film's title is a reference to New Hampshire's state motto "Live Free or Die." The film was shipped to theaters under the title "New Hampshire."