From the Christmas special, everything between Achmed, Jeff and Guitar Guy. Jeff and Guitar Guy trying not to laugh, and accidentally combining scoliosis and polio due to a slip of the tongue.
Achmed: What the fuck is polosis?! "Help, I'm twisted and I can't get up!"
"Poliosis" is an actual disease, though it obviously has nothing to do with scoliosis or polio.
The "Jingle Bombs" song.
Achmed: I~ used to be a man / But every time I cough / Thanks to Uncle Sam / My nuts keep falling off (music stops as Jeff and Guitar Guy stare at Achmed, and try to have a look for themselves) Achmed: Stop staring, you perverts!
One of the few instances where Dunham doesn't use his puppets - relating the story of the small dog his wife and daughter recently adopted. The dog was quite dumb, with the particular incident cited being carrying a stick longer than its body in its mouth length-wise. While running and carrying the stick like this, the dog angled its face toward the ground and wound up pole-vaulting. While his wife and daughter rushed to help, Dunham was laughing his ass off.
"Then I thought, 'Damn, if it had been going a just little bit faster, I'd have a new puppet: a chihuahua on a stick!'"
During one skit with Walter, a random guy from the crowd gets up to take a bathroom break. Walter decides that he's not getting away with that and shuts the show down to wait for him.
Walter on arguing with his wife:
My mom always told me that if I ever got into a bind, I should ask "What would Jesus do?" So I tried turning her into a fish. Begone, Satan! Hello, Shamu.
There's also the burning followup to that: "At least Shamu only has one blow hole."
For the Halloween Special, the puppets all dressed up as the thing they fear the most (save for Bubba J, who dressed as a vampire, because he, like vampires, hang out with people who have red necks, and Peanut and Jose, who were parodies of Batman and Robin, called Batnut and Ruben). Walter was a parody of Frankenstein's monster, called Crankenstein, and Achmed was an American woman. That is all.
Walter originally wanted to dress as a Catholic priest but decided against it because "everybody gets mad when [he] offend[s] the Mexicans."
Jose originally wanted to dress as "an ugly whore" but couldn't because he "could not find a mask that looks like [Peanut's] sister."
Bubba J taking a gun safety course: "Got it. Don't aim it at anyone that you like."
Peanut's idea of how a business analyst does their job.
Peanut: How the hell does that work? Do you go to a business and go "Mm mm mm mm you are a business.".
The very first scene of Spark of Insanity, showing most of Jeff's puppets in bed with him and his ex-wife, Paige:
Walter:(in his sleep) Aw, these kids with their hipping and hopping and ... Pull up your damn pants, ya morons! Jeff:(in his sleep) Second Comedy Central special. It's gonna be great! No, Mommy, I don't wanna wear the pink bow! Peanut: He even does this in his sleep! What a freak! Paige:(annoyed) Would you idiots give it a rest? Jose:(to Paige) Would you like to see my steek? (Paige screams)
Walter making fun of Jeff owning a blue Prius. Apparently when it drives past, it goes "Iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii'm gay!"
Walter: And when it's idling, it goes "Homohomohomohomohomohomo."
Peanut's use of the Jeff-fa-fa DunHAM dot com gag in Spark of Insanity, after he asks Jeff "Am I pissing you off-fa-fa?"
Peanut: You know, the funny thing is I actually AM pissing him off and he would like to kill me! But he will not kill me because that would be a form of suicide!
Peanut's point about how From a Certain Point of View, all of his puppets have slept with Jeff's wife. When Jeff's wacky and having a good time, that's Peanut, when Jeff's pissed off and regretting marrying her, that's Walter. When he's so angry that he wants to kill her, that's Achmed the Dead Terroist. Jeff's also a sick man for asking what Jose Jalapeno on a Stick is.
The ending of the Christmas special, in which Jeff tries to read "'Twas the Night Before Christmas", in spite of constant interruptions from Peanut. Example:
Jeff: "The stockings were hung by the chimney with care—" Peanut: And believe me, the room could use some fresh air. (Jeff stares) Peanut: Seriously, how the hell did that tradition start? Jeff: What? Peanut: Hanging up dirty laundry, hoping Santa would fill it with goodies? Ewwww!! I'd like to suck on this candy cane, but it smells like dad's feet! Good thing the tradition wasn't jockstraps. "Sally, what's in yours?" "Nuts. And mommy says they're magically delicious!" Jeff: You are ruining this story! Peanut: Well, you're the pervert eating out of your own jockstrap!
During "Arguing With Myself", Jeff stares at Peanut, off which Peanut starts a staring contest:
Peanut: I will never BLINK!
In the midst of a conversation between Peanut and Jose Jalapeno on a Stick (held entirely in Spanish), Jeff interrupts them, claiming to feel left out. Why?