Claudia's "Me Dance" in "Trials". And the snap she does at the end of that scene.
In "Magnetism", a hypnotic chair releases Myka's subconscious desires. So she starts punching Pete in the face. A lot.
Pete: What were you thinking just then? What were you feeling?
Myka: Nothing. (beat) ...Okay, I was kinda thinking that you're an infantile chimp. I'm sorry.
I ask you, is there anything more funny then watching Pete and Myka being stalked and attacked by multiplying dodgeballs in "Breakdown"?
Pete's victory dance when he beats said dodgeballs might be a candidate:
Pete: Who smells like tuna-fish now, Ralph Brunsky?
Pete: (snapping out of it) ...Huh?
Pete: Oh, it's just...I was having a...little playground flashback...
In "Trials", Jinks revealing to Claudia that he's homosexual, after Claudia accuses him of staring at her with romantic intent.
Similarly, Pete's reaction to finding this out in "Love Sick" - from the way Myka recounts the story, the audience would at first think that Manly Man Pete might be disturbed. Instead, Pete's reaction was to just go with the audacity of it all and take his top off to allow Jinks to gaze upon his beauty.
When Pete used Timothy Leary's reading glasses in "For the Team", to amuse himself when he was forced into a temporary desk job. Loved the bit when he saw Artie in the form a walrus-headed man!
In the (mistaken) belief that Artie is homosexual, Hugo calmly asks him if he is what they call "a bear".
In "Love Sick", when Claudia, Myka, and Pete are teasing Artie about his crush on Vanessa, new guy Jinks asks who Vanessa is:
HG Wells being questioned about just how much she got around.
Woolly: Really, HG, is there not a man in London whom you haven't...charmed?
HG Wells: Oscar Wilde, and not for lack of trying.
Pavlov's Handbell: May cause excessive drooling for 24 hours.
Artie: Children, don't fight. I can be both a d-bag and insane.
Claudia: Can you teach me how to do that (makes kung fu sounds, mimes a kick), because I tried it on the light switch and I think I broke my toe. I know I broke the light switch.
"Age Before Beauty"
Pete: It's like a game of gay Clue.
Pete: I put on Abe Lincoln's hat once? Had an uncontrollable urge to free Mrs. Fredrick. Don't think that didn't get me into trouble.
The episode "Mild Mannered" introduced a superpowered vigilante who got his powers from a pair of boxers ...nutty, ain't it?
Pete all psyched to become a real life superhero with Claudia's special Power Nullifier suit, only to be told that side effects include draining the wearer of all vital fluids if worn for more than an hour... and in men, impotence. Cue him quickly handing it to Myka.
Claudia's imitation of Artie's characteristic grouchy barking.
Pete and Fargo bond over shared phobia's in "Don't Hate The Player".
Fargo: Most of my nightmares are about me losing my hair.
Pete: (so excited) Me toooooo!
Fargo modeled various NPCs in the game world after warehouse staff. When the party gets to the princess, they discover that he modeled her after Claudia. With a couple of changes.
Claudia: What are those things on my chest?
Pete hugging Mrs. Frederic in the "It's A Wonderful Life" Christmas special. The rest of the cast's reactions put it over the top.
H.G.: I know a thing or two about the opposite sex. (nostalgic) Many of my lovers were men.
The reaction of the rest of the team is priceless.
In the tie-in novel A Touch Of Fever, Claudia is possessed by Anne Bonney's cutlass, which causes her to attack Artie while speaking pirate. Most of the things that she says are priceless, including calling him a "grumpy, bushy-eyed old walrus."
Also from that same scene:
Possessed!Claudia: I'll have you keelhauled and fed to the fishes!
Artie: What fishes? We're in the middle of the Badlands!
Possessed!Claudia: Don't try to confuse me!
In "Stand", Myka and Artie figure out where Sykes is heading and keep cutting off each other's sentences, to Jane's frustration.
Jane: You two do realize you haven't finished a sentence yet, right?
In "The Greatest Gift", MacPherson calling back to the fudge question from the pilot in the most deadpan way possible.
"A New Hope", when Artie and Claudia find the hole where the astrolabe is located. Claudia teases Artie when he can't fit into the hole.
Claudia: Hey Pooh Bear. You wanna let me do that? Artie: Now do you see why it was important that you came along? Claudia: Yeah; just picturing you trying to get through there... "Oh, help and bother, I'm stuck"— Artie: All right, all right! Claudia: "I'm so rumbly with my tumbly"— Artie: Stop it! Claudia: "Silly old bear!" Artie: Enough!
A bit later in the episode, when they see the astrolabe:
Claudia: That's why it's a 24-hour stopwatch; because Magellan was the first guy to sail all the way around the world! Artie: So you actually paid attention in fifth grade? Claudia: Yeah. Now think back to your youth and try to remember what he said to you on deck the night he crossed the International Date Line. Artie: I never tire of those comments. (Claudia grins)
Earlier in the same episode, when Myka shows that she also knows Portuguese:
Myka: That's Portuguese for, um, "Push the button."
(Pete, Artie, Leena and Claudia turn to stare at her)
Myka: Really? This is still a surprise to you?
Also in the same episode, when figuring out what M 4:18 means:
Myka: Wait, 16:18, chapter and verse!
Pete: You guys sound excited, did I solve it?
Artie and Myka: What if the "M" doesn't stand for Magellan, it stands for a book in the Bible!
Claudia: You know, the only Ms in the Old Testament are Micah and Malachi and they don't have a 16th chapter. In the New Testament it'd be Mark or Matthew.
(Pete, Artie, and Myka turn to Claudia's direction)
Claudia: They made us read the Bible a lot in the psych hospital, I think that's how they kept their funding.
From "Personal Effects", this exchange between Jinks and a lingerie store clerk, while observing for an invisible artifact user.
Clerk: You know, I'm not supposed to let people watch the changing room camera. Kind of a store policy.
Steve: Don't worry, I'm a federal agent...and I'm gay.
Pete: Urgh! Get me some popcorn and a tampon, cause I'm watching a romantic comedy!
Myka: What? Shut up!
Pete: Oh yeah? You and Mike meet, you hate each other and next thing you know, you're kissing!
Myka: That's crazy!
Pete: Oh yeah? Cause love is crazy, Mykes! *snaps fingers* That's right girl! And I am the sassy best friend!
In "Endless Wonder", when Pete and Myka check in with Artie, he assures them that they're definitely after an artifact, because:
Artie: Adults don't have growth spurts. (Beat, glares at Farnsworth) No short jokes, no fat jokes, no old jokes.
Pete: ...Well, then I got nothing.
From the same episode, when we're led to believe that a drug company exec and a senator have discovered the Warehouse: "Gentlemen, welcome....to Storage Space Six!" [cut to a room full of random tchotkes]
Myka and her sister Tracy's bickering (Tracy affected by an artifact of course) during "The Ones You Love".
Same episode has Pete trying to get rid of a tattoo which is about to make him blow up. Even on the brink of death, Pete is still incredibly hilarious:
Pete: Myka, please don't let my last words be "I should've done yoga"!
Ms. Frederick herself manages one at the very beginning of the episode while discussing what can only be the Holy Grail with a priest at the Vatican.
Ms. Frederick: Only a trained eye could detect the dent.
Ms. Frederick: Well, I'm not the one who dropped it.
Claudia makes the funniest Badass Boast ever in "We All Fall Down":
Claudia: (while holding down a German woman trying to stop the team) Sprechen sie headlock?
Professor Sutton AKA The Count of St. Germain is a walking, talking example of snarking British hilarity.
Pete's Secret Service password: Peterulz23
Pete: I always found it weird how Peterulz1 through 22 were taken.
The gang has to use Artie's car as bait for a car thief.
Steve: Classic car buff Artie Weisfelt bids a fond farewell to his 1964 convertible before it leaves for its new home, Sinsheim Germany's Auto & Technik Museum. Hey, nice shades!