In this episode, the town's first Wall-Mart is built. However, in Episode 7.7, "Red Man's Greed", Stan mentions that the town already has a Wall-Mart, a full season before the "first" is actually built.
At 3:50, Randy is standing at the bedroom window admiring the town's new Wall-Mart while Sharon is asleep in the bed behind him. She is wearing a purple eye mask across her eyes. While still asleep at 3:56, Sharon's eye mask is missing. Finally at 4:05, Sharon awakes and the eye mask has suddenly reappeared across her forehead.