In the scene where they are driving down the highway and the house rolls over the highway, you’ll notice that as they enter the house it is on its side. When they show the truck going through the house, they are going through a house that is standing upright. You’ll also notice that as they go through one of the inside walls of the house, the door will open as if to let the truck through. When the truck exits the house, it is still on the highway on its side. The truck also jumps out of the house in the air, when it entered on the ground.