Lucy: That stupid blockhead of a brother of mine is out in the pumpkin patch making his yearly fool of himself.
Somewhat ironic, in that this is one of the few specials in which Lucy shows flashes of altruism - she gets extra candy for Linus, and sets an alarm so she can go bring him inside from the pumpkin patch instead of letting him shiver out there throughout the night
When the kids are going door to door and getting their bags filled, you can actually see the rocks being tossed into Charlie Brown's bag.
When Lucy goes bobbing for apples and comes up with one that has Snoopy on the other side and freaks out.
Lucy: Blecch! My lips touched dog lips!
Right before that, when Lucy is preparing to demonstrate the proper way to bob for apples, one of the kids snarks, "Yeah, Lucy, you should be good at this; you have the perfect mouth for it!"
When Schroeder plays "It's a Long Way to Tipperary", "There's a Long Long Trail" and "Pack Up Your Troubles" in succession, and Snoopy's responding mood shifts from happy to sad accordingly...
Culminating when Schroeder's rendition of "Roses of Picardy" provokes an "OwwwOOOOOOOoooooooOOOOhhhhhhhhh!" from Snoopy. note This scene was omitted from post-2013 ABC broadcasts to make room for Toy Storyof Terror.
Snoopy rising out of the pumpkin patch and causing Linus to faint, then disappearing immediately after.
When the Great Pumpkin fails to appear, Sally gives Linus an epic dressing-down that culminates in her violently shaking him while hollering, "YOU OWE ME RESTITUTION!"
The whole tirade comes across as an angry woman chewing out her cheating husband/boyfriend....and it's followed by that "Woman Scorned" bit between Linus and Charlie Brown.
Charlie Brown trying to console Linus:
Charlie Brown: Well, don't take it too hard, Linus. I've done a lot of stupid things in my life, too!
He had inadvertently pushed Linus' Berserk Button when he said that. Linus proceeds to berate him all through the end credits.
When Snoopy first sees Linus writing to the Great Pumpkin, the beagle starts laughing hysterically. Still laughing, he walks over to Lucy, who is holding the aforementioned magazine...and she promptly tosses him away like a rag doll.
Right after the above occurs, Lucy walks up to Linus, glances in annoyance at the letter he's composing, then abruptly grabs and shakes her brother violently.
Lucy: NOT AGAIN! Writing a letter to a stupid pumpkin?!
In the beginning, Linus, licking a huge sucker and is sticky as all get out, jumps in Charlie Brown's leaf pile and ends up with a leaf-covered confection and a "beard" of leaves. Quoth the leaf-bearded Van Pelt boy, "Never jump into a leaf pile with a wet sucker!"
This promo for a 2003 Canadian airing of the special.
Lucy asking Charlie Brown to kick the football, holding a signed document promising that she won't pull it away. Charlie Brown runs up to kick the ball, convinced that Lucy won't pull it away. She pulls it away, and Charlie falls flat on his back.
Lucy: Peculiar thing about this document. It was never notarized.
This webcomic gives a pretty funny alternative explanation for why the Great Pumpkin never showed up.