 CONT: When Homer and Marge get stuck in the mud while driving out to  the boon ducts to get a new refrigerator motor, they get out the car  and it starts raining, so they run into a nearby barn. When they  enter the barn, they shut the door, but in one of the next shots,  you see the pigs are let out and the door is open. Then in the next  shot, when the farmer gets his pitchfork/rifle, the barn door is  shut and he has to kick the door open to get inside.