The scene of Tony's swimming exercises opening like he's giving birth.
Hypnotia in disguise pushing M.O.D.O.K. around in a baby stroller, who, upon confirming his information, basically flies off and ditches her.
Hypnotia: What about my ride?! You horrid little troll!
The Origin of the Mandarin
M.O.D.O.K. accidentally punching Hypnotia in the face. She then clonks him and calls him "Dorkmeister."
Iron Man and Force Works also manage to find what appears to be Mandarin's diary and personal records.
War Machine: The Mandarin keeps a diary?
Spider-Woman: Sure, Jim. Dear Diary, I couldn't get a date for The Prom so I had to take M.O.D.O.K.
Iron Man To The Second Power
When the Mandarin's ring turns a rose into a monster, as he destroys the creature Hypnotia remarks "Maybe you'll have better luck with vegetables." The Mandarin's annoyed expression and the fact he didn't fly into a murderous rage at her snarking makes it even funnier.
When MODOK summons the Mandarin via gong, the Mandarin has this to say:
Justin Hammer's Bad "Bad Acting" when the duplicate Iron Man "steals" the Dark Water Fever antidote.
Justin Hammer: Is there no one we can trust?!
And he's filming the whole sequence with a handheld video camera.
The suspicious, repeated use of the word "stimulating."
Hypnotia: Make the farmers spray the crop with the fungus. In 36 hours it will breed enough Dark Water Fever toxin to decimate Los Angeles.
Dreadknight (laughing): Los Angeles. Fire! Floods! Riots! Earthquakes! And now... FEVER! How stimulating.
When Dreadknight and Blacklash get into another fight over Hypnotia:
Dreadknight (brandishing his lance): You need a little iron in your diet!
Blacklash: And you need a spelling lesson!
(Blacklash proceeds to spell "bozo" in the ground with his whip)
Blacklash: B! O! Z! O! Spells "Dreadknight"!
Dreadknight: You dare to call me a B, Oz... BOZO?!
Hypnotia: Oh give me a break!
When Hammer hands out antidote pills to the others, he advises them to take more than one, and claims that they're actually quite tasty.
Wanda's tarot reading is summed up as "What you see isn't always what you get." Julia then quips "You just described my ex-husband, the dork."
When the two Iron Men are revealed to the public in the middle of a fight in "Iron Man to the Second Power":
Two Police Officers: Two Iron Mans?! Ditz Bystander: Gosh, I don't know who to root for! Old Lady Bystander: The one that didn't try to kill us, Dumbo! Ditz Bystander: Dumbo is my favorite animal picture. Iron Man versus Iron Man! Ooh I wonder who will emerge victorious? That means "win".
(The Old Lady Bystander has a look that says "take me now")
M.O.D.O.K. fears the duplicate Iron Man won't be able to beat the real deal in a fair fight. invoked
The Mandarin: "Fair?" Did you say "a fair fight?" Did you get your head caught in a revolving door?!
The Mandarin's completely incredulous reaction to M.O.D.O.K.'s statement is nothing short of hilarious, due to the fact that he legitimately cannot believe M.O.D.O.K. could be that stupid.
And at one point, M.O.D.O.K. mutters "Ace in the hole, my clavicle" in response to the Mandarin having the Grey Gargoyle step in as a last defense. Having realize he just badmouthed his boss's planright in front of him then starts slapping himself going "Bad MODOK, bad!"
In "The Origin of Iron Man", Fin Fang Foom comes to the Mandarin's citadel to discuss something- he and MODOK promptly rush outside, because as Mandarin says, "Last time he came inside, it took me a month to get the smell out of the tapestry."
When MODOK has had enough of Fin Fang Foom, he tells him to "eat a ton of breath mints!"
"The Defection of Hawkeye":
When the Mandarin has his minions look over their past defeats, Justin Hammer proclaims the experience to be a "major league bummer". Hypnotia actually enjoys how "contempory" that was.
After the Mandarin destroys MODOK's spy raven, his reaction is a stunned "You broke my birdie".
When Hypnotia pretends to be drowning to lure Hawkeye in close enough to hypnotize him, she jokingly calls him "Mister Baywatch" for falling for the ruse.
Season 2
"Cell of Iron" ends with the Mandarin retrieving one of his rings from a bird nest atop a snowy mountain peak. The momma bird approaches and the Mandarin dramatically declares "Prepare to fry!"...only for his ring to short out, and the result is the bird picks him up and carries him off! "Nice birdy, put me down..." The bird obliges, and drops the Mandarin, who promptly falls into a ravine.
Season 2's "Iron Man, On The Inside" is full of gems:
Later on, HOMER is infected by a computer virus, and he starts going crazy, babbling non-sequiturs like "A pineapple a day keeps the d-d-doctor away!", "Surf the internet, yee-haw!" and "Peter Parker picked a peck of pickled porpoises!" Julia quips that HOMER's "A few bits short of a megabyte", while Tony mutters "I ask for help and I get bad poetry."
Tony finding out he's in Hawkeye's liver. "Liver? I hate liver!" The tone of voice makes him sound like a whiny kid; it's promptly reinforced when his armor starts to melt (since as Julia points out, one of the liver's functions is to absorb iron into the bloodstream).
Hawkeye's nonplussed reaction at finding the true identity of The Hacker. "Well, I'll be. He's just some snot-nosed kid!"
"Distant Boundaries":
When H.O.M.E.R. interrupts an intimate moment between Tony and Julia, he wonders if they're conducting "facial inspections". It becomes a Brick Joke at the end; When Rhodey wonders what's up with the two of them, he's given the same answer.
After landing on the alien planet, Rhodey suffers a Claustrophobia attack.
Iron Man: No, armor's gotta stay on! I'll slap you if I have to! War Machine:(cracks up) Gonna pull my hair too, boss man?
IM also busts into a spa run by The Controller (who's busy brainwashing the yuppies and having them transfer all their money to him); he examines one of the Controller's mind-control discs, and startles a woman who was expecting a masseur ("Oh. Wrong room. Brainwashing is in 4A!") before he punches his way through the wall and out of the room.
After he tussles with the Controller, sending the latter into a fountain, the water and Negator Pack causes the Controller to get electrocuted (causing his outfit to catch fire). "Hmm, electricity and water -- not a good mix. HOMER, remind me to apply all future negators after the subject has had his bath."
