Corrected entry: When Homer and Marge are discussing buying Bart a guitar, whenever there is a close-up of Marge, you can see that there are some patterns of trains on the wall behind her. They aren't there when the shot is of both Homer and Marge.
Yoshi
8th Sep 2003
Correction: When the shot is of Marge, the camera is in the corner where Maggie's crib is. Therefore, the trains are on the other end of the room.
Yoshi