Corrected entry: When Captain Oveur is summoned to the white courtesy phone, he picks up the red one at first and is told "No - the white phone." He replies "Oh." Just after his response and just before he hangs up the phone, a small higher-pitched sound is heard. According to Peter Graves in the commentary, that's the script supervisor stifling a laugh. (00:05:40)
Jeff Swanson
18th Jan 2006
Correction: If you have to listen to the commentary to find out the sound is a laugh then its not really a mistake but a sound at an busy airport.
Lummie ★