Even though Homer's tirade towards the ambulance for cutting him off had him being bleeped out, the actual words comprising the bleeps according to the closed captioning were extremely tame curses (eg, screw, damn, stupid, and dingus) that would not have needed to be bleeped out and weren't either in prior episodes, or even in prior or later scenes of that episode.
Specifically, according to the closed captioning, Homer's "uncensored" tirade in full was the following: "Hey, you [dingus], you cut me off! Ah, yeah, [screw] you!" … "[Stupid] Ambulance! You think you're so big with your [damn] [<extra beep>] siren and your letters on backwards!"
Homer typing the same thing over and over spoofs the 1980 film "The Shining".
"Citizen Kane" is referenced multiple times throughout the episode, such as the "cane from Citizen Kane" and the scene where Homer tells Lisa, 'people will think what I tell them to think' and that she, 'can't do this to me, I'm Homer Simpson!' as she leaves the room.
Homer's dummy sings on it's recording a parody of Donna Summer's "She works hard for the money".
The ambulance that cut Homer off did not have its siren on, meaning it should be subject to the same rules of the road as any other vehicle. Lisa simply pointed out that it was an ambulance; Homer's tirade said nothing about any emergency.
There was a cane in Citizen Kane. However, it did not play a major role in the narrative, which may be why Lisa doesn't remember it.
It could be possible that while writing the second review on the restaurant he forgot that he has already written one or that he likes it so he wanted to make up to the restaurant for writing a bad review.
In the scene where the restaurateurs, critics and animals are behind Homer and Lisa, and are about to give the former his comeuppance, Daphne Beaumont's lipstick disappears from her lips when she clenches her teeth.
Why are the overweight citizens giving Homer his comeuppance? At least in Mr. Burns' case, it could have either been due to Homer, albeit unintentionally, ruining the eating contest, or the fact that Homer's positive critiques for foods was indirectly responsible for breaking his shin bones multiple times, or even that Homer's earlier dummy used to escape work caught on fire and presumably caused significant damage to the office it was placed inside, not to mention being tricked. The animals being present likewise was most likely due to his earlier, albeit unintentionally, instigating a stampede among them due to his loudly exclaiming his frustration at taking his kids to the wrong place.
Marge tells Homer that the E key on the typewriter is broken, yet he is able to type "screw Flanders". Lisa probably fixed it off-screen or somebody else did. Or it is possible that Marge was only kidding.
Flanders was briefly seen as having become overweight (no doubt due to Homer's positive reviews for restaurants), yet at the eat-athon, he was shown to be back at his usual weight. Presumably, Flanders spent a lot of time exercising to remove the excess weight beforehand.
Smithers apparently heeding Mr. Burns' request to promote "Homer" and falling for the dummy is extremely uncharacteristic of Smithers, as he's usually the first one to point out that he's not actually Homer.