Corrected entry: While the family is driving home after picking out their tree and before the tire blowout, the kids and the wife are singing "Jingle Bells". On the driver's side of the car, a shadow of a microphone is seen bouncing up and down to the song, conducting the cast as they sing the song.
Movie Nut
11th Feb 2013
Correction: After looking closely at the scene, the shadow on the Old Man's side of the car is Ralph's stocking cap. This can be told because it is the shape of Ralph's cap, moves in time to his movements and comes from behind, rather than in front of, the Old Man.
Movie Nut