Continuity mistake: At the town hall meeting, when Lenny says, "It's not so bad," there's a single head light fixture on the wall near the balcony, but when Moe shouts, "This is why we should hate kids," there's a double head fixture on the wall, and yet in the first overhead shot of the meeting there's no fixture at all in that space. (00:20:05)
Continuity mistake: After Scratchy blows up in the movie they're watching, when Homer stands up in the shot facing the audience there are two empty seats behind Homer, between Dr. Hibbert and Marge, who's seated beside Lisa, but in the next shot facing the screen Marge is now seated beside Dr. Hibbert, and there's only one empty seat now between Marge and Lisa. (00:01:20)
Continuity mistake: While Bart's standing on the roof's TV antenna when Homer's shaking it, in the overhead shot of the house - note the front walkway and the wood fence between Flanders' and Simpsons' houses, the chimney is actually missing from the side of the roof adjacent to Flanders' house, and the antenna is also much closer to that side of the house than it should be. (00:08:00)
Continuity mistake: When Bart falls off the roof and grabs hold of the rain gutter, it's one continuous seamless piece of trough material, but in the following shots that gutter consists of a few connected sections. (00:08:05)
Continuity mistake: There's a water spigot under the window on the wall at the front of the house, near the garage door, which can be seen after the lake is blocked off, but this spigot didn't exist right before Bart skateboarded naked, then it vanishes again and reappears during the fire.
Continuity mistake: When Homer says "I'll let you hold the bomb" to Bart, the timer on the bomb is in the right corner of the bomb. Every other shot of the bomb shows the timer in the middle of the bomb.
Continuity mistake: After the crowd boos at Homer after kicking the bomb, Bart is shown walking past The Android's Dungeon and the shot pans over to show Comic Book Guy. Just as the shot begins to pan over, it can be seen that Comic Book Guy randomly pops up on screen.
Continuity mistake: The shot where Homer kicks the bomb shows a group of people a few meters behind him. A few shots later, they are suddenly right behind him.
Continuity mistake: When Cletus goes to distract Cargill, a crowd of Springfield citizens go to place the KBBL news tower next to the rope so they can climb up it. They are all on the ground when Cletus starts talking to him. Cletus then says "Look what I can do with my thumb" and the crowd is suddenly half way up the rope with no time to do so.
Continuity mistake: When Homer squirts the super glue on his hand, he throws the glue container on the floor behind him. When he starts to climb up the wall, the glue's container has vanished from the ground.
Continuity mistake: After the title card "Immediately" is shown, Homer is lying unconscious in the snow. Next to Homer's hood is an extra amount of snow rest next to his ear. Next shot, the extra snow has vanished.
Continuity mistake: When Homer puts the video in the VCR player, as Marge says "Homer", outside the window shows a dark sky in the background. Marge then talks for a bit and the shot returns to Homer saying "Way back." Outside the window suddenly shows a background that is partially brighter and raining.
Continuity mistake: After the Alcoholics Anonymous meeting runs out of the church, Barney starts yelling and a huge crowd is visible behind him. Bumblebee Man is standing a few meters away from Barney on the end of a row. Next shot, Otto and Moe have suddenly appeared next to him as well as a huge crowd.
Continuity mistake: When the Alcoholics Anonymous run out of the church, Barney yells out "I can't take another minute in this dome!" and charges towards the dome. In the overview shot, the church is directly behind Barney. In the following shot that shows Barney hitting the dome, the background has changed completely. The church is no longer there and two houses have suddenly appeared.
Continuity mistake: When the two deer enter through the cabin window to help Homer and Marge, a trail of snow is visible behind them and in front of the window. In an instant close-up of the smaller deer, half of the snow has instantly melted and vanished. Then all the water has vanished and it's just snow. Then a few shots later, the snow vanishes completely.
Continuity mistake: When Marge and Bart are at the counter at the gas station, the first shot of them at the counter shows the strap on Marge's bag facing behind the bag. The shot then changes to Bart using his slingshot, and Marge, visible in frame throughout the entire shot, is never shown touching the bag, but when the shot cuts again, the strap is suddenly in front of the bag.
Continuity mistake: When the Simpsons are at the gas station, Marge congratulates Bart on being sober for 24 hours. The Buzz Cola can next to Bart has the logo facing front ways. Bart then aims his slingshot which cuts to a shot from behind them and the Buzz Cola logo on the can is still facing front ways, despite the angle change.
Continuity mistake: When the mob are invading, Lisa sees Colin in the crowd with a bouquet of flowers and nothing else. Later on after the house is destroyed, he suddenly has a guitar with him despite not having it with him a few minutes earlier. (00:32:30)
Continuity mistake: When Maggie gets out the dome, Marge runs to get Homer. They run outside in a straight 12 o'clock direction. Yet as Homer says "This dome can play tricks on you", they are suddenly several steps to the right of the door instead of being directly behind it. (00:30:00)
Continuity mistake: When everyone approaches the edge of the dome, a group of police officers arrive. As Chief Wiggum says "open fire", he is standing in front of the officers. In the next shot, Wiggum and the officers are standing even with each other. (00:27:40)
Answer: I believe the joke is supposed to be that the way Texans speak is a language all its own.
Damian Torres