Continuity mistake: The Simpsons enter a motel (Red Rash Inn) to hide, and it's clear from the outside that the building is only one story high. But when Homer flings back the curtains to reveal the buildings and billboards, it appears that the motel room is located on a much higher floor, since the view seems to be level with the building tops.
Continuity mistake: In the scene where they are climbing the rope to escape the dome, the hole seems to be very wide. Yet when Homer is on top of the dome the hole is very small.
Continuity mistake: This is when Homer is about to conquer the 'Ball of Death', on his third attempt. As he is going up, just after Lisa shouts, "Don't slow down, speed up," when Homer has his fingers on the brakes, the Ball of Death suddenly gets a lot bigger.
Continuity mistake: The thickness of the dome changes from when it's dropped on Springfield to when they are escaping.
Continuity mistake: The size of the round window in the church changes size throughout the film.
Continuity mistake: Marge and Bart discover the wanted poster of them at the gas station. When the clerk enters the scene, his shadow is cast on the wall, cork board and the wanted poster behind him. The clerk never moves, nor does the lighting ever change, but as he says "OK" after Marge asks for diapers, his shadow has vanished.
Continuity mistake: After Marge shouts into the megaphone for the bomb to be thrown, it cuts to Homer and Bart while they're riding sideways on the motorcycle, and the bomb's under Bart's left arm while he's holding onto Homer with his right hand, but in the following shots the bomb's under Bart's right arm while he's holding Homer with his left hand.
Audio problem: When Maggie is trying to point out the sinkhole, Marge says "We'll play later." Her mouth doesn't match what she says.
Factual error: Marge, Bart, Lisa, and Maggie Simpson take the train from Alaska to Seattle, Wash. (The train shown in Alaska, is the exact same one that arrives in Seattle). This is not possible as there is no train, (passenger or freight), that links Alaska to the southern 48 states, including Seattle, Wash. Homer Simpson does not take the train to the southern 48 states.
Continuity mistake: In the exterior shot of the Simpson house, before showing Homer and Marge watching the news about the silo being found in the lake, we see the side window (facing the Flanders' house, from which they escape later) is a horizontal sliding window. However, from inside the bedroom and also when they are escaping, that same window has changed to a vertical sliding window. The same thing happens with the other window on the opposite side of their chimney.
Continuity mistake: When Homer tries to convince Bart to come with him on the motorbike, he first holds the bomb in his right hand, but then it's in his left one in a different angle.
Continuity mistake: When Mayor Quimby asks Cletus to demonstrate the anti-pollution barriers around the lake are idiot-proof, his entourage is spread apart, but the next shot of Quimby shows his entourage bunched closer together behind him.
Continuity mistake: When Homer and Bart are trying to outrun the crack in the dome, they are falling towards the damaged "P" in the Springfield sign. From their view, the top of the "P" is level with the letters "S" and "R" but when they use the bent leg of the "P" as a ramp to relaunch themselves at the dome, the top of the "P" is scrunched down almost halfway down from the other letters.
Continuity mistake: While Marge and Homer are watching the news on TV note their bed's footboard, then when Lisa angrily rushes into her parents' bedroom to confront Homer, the footboard's style is entirely different, but when Marge pulls Lisa away from Homer the footboard changes back to the original style.
Continuity mistake: When naked Bart skateboards past Wiggum's squad car, the vehicle does not have a partition screen between the front and back seats, a rear-view mirror, or a side mount searchlight, but in the following shots all have suddenly appeared, with other changes.
Continuity mistake: During the church scene, Martha Quimby is wearing an outfit with sleeves, but soon she's sleeveless, then back to sleeves, and finally sleeveless again. Behind Martha sits Bernice Hibbert, whose pearls also disappear and reappear.
Continuity mistake: Throughout the movie, the exterior side wall of the Simpsons garage changes length significantly, even between shots.
Continuity mistake: In the wide overhead shots as the crowd starts gathering at the dome edge and when Russ Cargill's image appears, note the homes on the third block at the far left side of the screen, which change when Cargill says, "Believe me it's the last thing we wanted to do."
Continuity mistake: When the Simpsons enter church they walk past Dr. Hibbert and he's wearing a solid black tie, but when Grampa has the outburst Dr. Hibbert is wearing a striped red tie. (Also, the stripes at the tie's knot are the same direction as the tie blade, though when tying the knot the stripes would be going the opposite direction).
Continuity mistake: In the first interior shot of the church, there are nine rows of pews on each side of the aisle, with Mr. Burns in the last pew on one side and Mrs. Glick in the last pew on the other side, but when Grampa starts rolling around on the floor there are eleven rows of pews, with two extra pews on both sides behind Burns and Glick. Additionally, the Reverend's wife is seated in the first pew, but just as Grampa shouts, "Trapped forever," we can see the back of an extra pew in front of Helen. (The front of the raised pulpit has vertical wood panels, and the pew is solid).
Answer: The family doesn't treat him very well, particularly Homer. He may have wanted some revenge on them. Grampa is also a little senile.
Phaneron ★