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".
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.
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.
Marge tells Homer that the E key on the typewriter is broken, yet he is able to type "screw Flanders", "pasghetti", and "momatoes". It's possible that Homer wrote "Screw Flanders" as "Scru Flandrs", "Scroo Flandars", he wrote "Pasghetti" as "Pasghatti" or "Pasghitto", he wrote "Momatoes" as "Momatos", or he put a space in where the Es would be so he could use his hand and a pen to place Es in the spaces.
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.