The part where they're looking at Giselle and she's just happily spinning in place for no reason.
All the woodland friends pouring out of the coach (remind you of a certain other Disney movie perchance?) like it's a clown car in the beginning. Also, having Narissa turn into the same crone as the Evil Queen from Snow White was a pretty funny touch.
That is one hilarious scene when Edward is riding on the roof of an MTA New York City Transit bus. He then stabs his sword through the roof, seemingly "killing" the bus (in reality, the driver applying the brakes). Then that Large Ham driver confronts Edward, and goes really bananas once Pip gets on her head and starts imitating her gestures. Bonus points if you notice that the driver's hair is made to look like a hidden Mickey.
Nathaniel popping out of the manhole and the annoyed utility crew asks him if he's looking for a beautiful princess like Edward was before him. Nathaniel replied "No. I'm looking for a prince, actually." Their dumbfounded looks cemented the scene.
"You make me so... angry! (laughs) I'm angry. Wait, I'm angry!" (Giselle punches Robert on the arm)
Edward knocks on a door, revealing a tired housewife with four girls. She looks at him and says, "You're too late."
And that, my dear tropers, was Judy Kuhn, the singing voice of Pocahontas.
Paige O'Hara (a.k.a. BELLE)'s cameo in a really bad Soap Opera. Especially the way she delivers the line "How can I love a man who doesn't even like himself?" Nathaniel's reactions were pretty funny too.
Nathaniel and Edward's conversation after this cements it:
Nathaniel: Sire... Do you like yourself?
Edward: (very casually) What's not to like?
At one point in the scene where Edward and Nathaniel are playing with the TV, they change the channel and the audience can hear the music of what they're watching...the Pink Elephant scene from Dumbo. Nathaniel immediately asks Edward to change the channel again.
Morgan's reaction when Edward asks Giselle "What's a date?"
Watch Morgan's face throughout that scene. She looks absolutely bewildered when Edward is singing to Giselle, despite the fact that she seems to like fairy tales. You can imagine her thinking "The crazy renaissance fair actor who just tried to kill my dad with a sword is now dancing in my apartment and singing."
Pip trying to tell Edward that Nathaniel is working for Narissa.