"DO YOU SEE WHAT HAPPENS WHEN YOU FIND A STRANGER IN THE ALPS?! DO YOU SEE WHAT HAPPENS LARRY?! DO YOU SEE WHAT HAPPENS WHEN YOU FEED A STONER SCRAMBLED EGGS?!"
The mere fact that Walter, a giant and alleged war veteran feels bested and "stonewalled" by Larry, a boy who doesn't even say a word.
(see Spit Take at the main page): "What is that, yoga?", "It increases the chances of conception" ...
The police chief in Malibu (combined with Nausea Fuel, because he makes you so sick) throwing the coffee mug right in Dude's face after he replies "Sorry, I wasn't listening" to his long and cautionary "The Reason You Suck" Speech (in a way, the irritant indeference makes it look even funnier while almost justified, nevertheless). Enhanced by Dude's reaction ("Ow, fucking fascist!").
As The Dude is being hustled into Mr. Lebowski's limo, he yells out, "Hey, careful, man, there's a beverage here, man!"
"Also, Dude, Chinaman is not the preferred nomenclature. Asian-American, please."
The Dude trying to throw a lit joint out the (closed) window of his car, the hot embers burning his crotch. While trying to douse the burning (with beer) he swerves and crashes into a garbage bin.
Donny's out of his element questions never cease to entertain.
The Dude: I don't need your fucking sympathy, man [Walter]. I need my fucking Johnson.
The thug who defaces the rug pronouncing "Ever thus to deadbeats" in the process, as if making a political point a la "Syc Semper Tyrannis" in the assasinations of Gaius Julius Caesar and Abraham Lincoln.
The Dude trying to pull a Royal "We" with Big Lebowski when he realizes he inadvertedly mentioned Walter came along.
The Dude thinking the boys in the picture are Big Lebowksi's literal children from different mothers,
Racially he's pretty cool huh?
Many of the gratuitous echoes and words one character borrows from another, "parlance of our times", unchecked aggression which will not stand, coitus, johnson etc...
He fixes the cable?, even funnier if it's taken as more clueless than snarky.
The Dude, in good ol' Phillip Marlowe mode, shades a notepad with a pencil to highlight the impression made on the next sheet of paper, only to discover Treehorn just drew a man with a big phallus.
Made doubly hilarious by the fact that the man is shaped like a giant phallus himself from torso upwards. In other words, a giant anthromorphic penis with a long erect penis of his own.
If you're mostly familiar with Philip Seymour Hoffman's serious roles, every one of his lines as The Comically SeriousLarge Ham Brandt becomes hysterical. Special mention goes to the limo scene:
Lebowski: They did not receive the money, you nitwit! They did not receive the money! Her life was in your hands!
Brandt:(adjusts glasses) This is our concern, Dude.