Shortly before the barracks scene, Keith David fell off of a seven foot railing outside the building while the actors were between shots, breaking two ribs and cracking two vertebra. He went on to film the scene in great pain, and then went to the hospital afterward.
The line "got any more daughters?" was ad-libbed by Larry the Cable Guy.
Jeff Foxworthy was originally set to star in the movie, but had to dropped out, due his schedule conflicts with Are You Smarter Than a 5th Grader? (2007).
The D.O.D. (Department Of Defense) would not let them film the opening scene in a U.S. Air Force hanger, so the shot was done in at the North Ridge, California V.A. hospital, with CGI airplanes added in. The cafeteria and barracks scene was shot there too.
According to Larry the Cable Guy, while they were shooting the movie, he gained seventeen pounds and later stated he was probably the only guy who could gain weight running around the desert in one hundred thirty degree Fahrenheit (fifty-four degrees Celsius) weather.