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The wine that Columbus and Wichita drink is a 1997 Beaulieu Vineyard BV Georges de Latour Private Reserve Cabernet, which sells for $125 to $150 a bottle.
Woody Harrelson was arrested for marijuana possession during filming, which delayed shooting for a day.
Abigail Breslin and Woody Harrelson's conversation in the Hummer scene about Hannah Montana was ad-libbed.
The "Zombie Kill of the Week" was leftover from the script's origin as a television pilot. Every weekly episode would have a Zombie Kill of the Week performed by characters on the show.
The script, originally a television pilot, was heavily revised to become a feature film.