Humor that floored you w/laughter, and you still chuckle just thinking of...

Bill Bryson’s A Walk in the Woods (which I spoofed in the “What if the Lord of the Rings had been written by somebody else?” thread) had me laughing so hard at a few points I had to put the book down so I could breathe. Mostly the parts in the beginning where he is imagining all the bad things that could happen to him out in the woods.

I could second a lot of the ones that have been mentioned here. My sister and I particularly love the Swamp Castle sequence from Monty Python and the Holy Grail, especially the part where the King is trying to issue orders to his guards.
“Where are you going?”
“Why, we’re going with you!”

Red Dwarf episode “Backwards” in which the guys manage to get back to Earth, but everything is running backwards.

The whole show is funny, but especially when the Cat has to go to the bathroom before they leave. The look on his face!

Bugs Bunny cartoon “Transylvannia 6-5000” when he and the vampire are throwing magic words and phrases at each other. The vampire becomes a bat, so Bugs Bunny becomes a baseball bat. The vampire puts on a pair of glasses and says, “You vouldn’t hit a bat with glasses on, vould you?” and then Bugs cracks him on the head. It’s the timing.

Tim Conway and Harvey Kormann on The Carol Burnett Show doing the dentist sketch.

Every Groucho Marx sequence in A Night At the Opera (including the stateroom scene described above).

Almost everything Homer Simpson says, especially when he gets haughty and self-righteous:
“I want to live life! The dizzying highs, the terrifying lows, the creamy middles!”
“What are you going to do, release the dogs, or the bees, or the dogs with bees in theirs mouths, and when they bark, they shoot bees at you?”

Homestar Runner.com (web cartoons): the 1930s-style black and white Homestar Runner episodes, anime Strong Bad, anything with Homsar.

The Saturday Night Live sketch with Christopher Walken playing Blue Oyster Cult’s manager–“I’ve got a fevuh, and the only prescription is MORE COWBELL!”

Seanbaby.com (not work-safe).

South Park (and not always the most obvious, telegraphed jokes–Cartman whining cracks me up every time, as does almost anything Butters says, and the song “I’ve Got Something In My Front Pocket For you” from a recent episode).

Chappelle’s Show - the obvious Rick James and Li’l Jon bits, of course, but most of what Dave says and does is fall-out-of-your-seat hilarious. YAYUH!

The one thing that always get me laughing is the scene in The Simpsons when Grandpa starts talking to Homer about his sexual problems. The way he draws it out is just great:

Grandpa: “You can’t talk to your old man about sex?”

Homer: “Dad, don’t ever say that word.”

Grnadpa: “I haaaaaaadddddd sexxxxxxxxxx!”

The Bugs Bunny cartoon where he’s in the castle with the mad scientist and breaks open a bottle of ether. “Come… back… here… you… rab… bit.”

I can’t believe I forgot MST3K. It’s a good thing I lost my only copy of Godzilla vs Megalon, because that whole episode is just painful I’m laughing so hard. Especially the bit when the little kid Roxxa (“You don’t have to put on the red light!”) is in the back of a truck, getting tossed around.
“I wet 'em!”
“I did it again!”
“That’s three times now! It’s starting to sting!”

Also, the episode Werewolf. The whole bit with the janitor werewolf driving around town (“He’s circling that gas station because it’s the weakest in the herd.”), our hero’s first transformation (“If I could just… fart…”) and most of all, the harrowing climax. The movie keeps cutting back to a still shot of the vahrvulf skeleton lying open-mouthed on an operating table, to which Tom Servo makes an operatic “AHHHHHHHHHH…” I was in tears the first time I saw that.

I made a thread about this a while back. It still gets me everytime.

The Vogon Poerty story in HHGTTG.

The dentist scene in one of the Pink Panther movies. Clouseau has on a disguse and it’s melting and there’s laughing gas all over the place.

Mr. Bean at a hotel. The whole episode, but mostly where he’s trying to out-eat another man.

“This is absolutely fascinating.”

There’s a lot of bits in Three Men in a Boat that just crack me up helplessly. The thing with the hat, and the bit about the maze in Kensington Gardens, and I forget what else. But it’s really a laff riot.

Oh, and there’s an awful bit of the episode of The Family Guy where Peter takes his son to experience their Irish heritage in the museum and there’s crappy animatronics of the Irish guy drinking and fighting and the Irish woman praying and whelping… oooh, shouldna laughed at that one. :slight_smile:

And I admit it, when I first saw the South Park movie I laughed so hard my face hurt and I almost wet my pants. “Operation Hide Behind the Darkies” indeed.

Taxi
Reverend Jim taking his written driving test.
Jim (whispering): “What does a yellow light mean?”
Bobby: “Slow down.”
Jim (speaking slowly): “What . . . does . . . a . . . yellow . . . light . . . mean?”

News Radio
Joe has rigged up a micro camera in a Boba Fett doll, in an effort to help Lisa cheat at poker (she doesn’t know about it, though, and was told that it was for good luck). Joe is in the next room, watching through a headset monitor. At the end of the game, Lisa dismisses the good luck charm and throws it out the window. Cut to Joe in the next room, screaming and thrashing!

The best part of this was how long they waited between the set up and the gag.

News Radio: Super Karate Monkey Death Car
The scene where Jimmy James reads from his book and takes questions is tears-streaming-from-your-eyes funny.

Python: Pantomine Horse is a Secret Agent
Just flat-out brilliantly bizarre. The two pantomine horses chasing each on horses, and then on two-person bikes. God, was I laughing.

Python: Scott of the Antarctic
Hilarious - “I wanna fight the lion” - but especially the actual lion fight. Predates the John West Bear commercial by three decades.

I just had to throw this in, since I heard this in a story on NPR a few weeks back. The “Overly Sincere Rocker” is actually the singer from Survivor (“Eye of the Tiger”)!

Someone mentioned Eddie Izzard but I’m going to mention specifically one thing he said. He had a special on HBO which was hilarious. He started talking about how Hitler obviously never played Risk because everyone knows you can’t hold Asia. He went on to give strategies Hitler could have used including holding up in Australia. To anyone who played Risk, it was dead on.

About two summers ago there was a summer filler show which made me choke it was so funny. The bit was the audio of a GWB speech about America being great and the people being such shining examples to the world while the video made the bit hilarious. It was non-stop footage of teenage boys doing idiotic things such as jumping from their roof on each other, setting each other on fire or hitting each other with chairs to act like professional wrestlers. I was laughing so hard my wife finally gave me grief because she didn’t get the joke.

I’m surprised someone else saw “The Party.” The whole movie is just so funny. I’m laughing as I type this, and I saw the movie about 25 years ago.

In my office, you can crack up certain people by saying “Is that Dr. White the veternarian?” But that’s another story.

When Carol Burnett did her take off of Gone With the Wind, when she turns around wearing the dress made of curtains, with the curtain rods still attached. This is shown in comedy clip shows all the time, and EVERY TIME it still slays me. There’s just something about how she turns aournd, so deadpan and such a master of timing that she gives the audience the exact beat needed to make the mental connection. Now I laugh when I see the actual dress scene in Gone With the Wind.

My favourite sketch is from sketch from The Day Today. It helps if you understand that Chris Morris is doing his “Paxman” character, but you don’t really need it. It’s just about the way news interviews work. At first Morris is the usual chummy presenter, then he switches to a really hard-hitting post-Paxman investigative jouranlist, then in the chaos created by his own unpleasantness he becomes a gravely sympathetic interviewer, then he’s chummy again. All for no reason, as far as we can see, than his own entertainment. It’s triff. I almost choked.

MORRIS: Tomorrow sees the opening of the London Jam Festival, selling pots of jam, some made by celebrities, to raise money for the homeless. With me is one of the organisers, Janet Breen. Janet, good to see you - this must have taken a heck of a lot of organising.

BREEN: Yes it has, actually, to get all the celebrities to contribute their jam has really been quite an operation.

MORRIS: How much of your time did you put into it?

BREEN: Oh, I would say at least six months.

MORRIS: Six months! To raise money for a jam festival? Isn’t that rather stupid?

BREEN: [Surprised] No I don’t think so, it’s all in a good cause.

MORRIS: A good cause, yeah, but how much are you going to raise?

BREEN: We hope to raise at least fifteen hundred pounds.

MORRIS: Fifteen hundred pounds?!? That’s a pathetic amount of money! You could raise more money by auctioning dogs!

BREEN: Well I don’t think so, I, I, I think it’s all in a good cause and very worthwhile-

MORRIS: You persuaded these celebrities to waste their time donating to it?

BREEN: Yes-

MORRIS: Well, who?

BREEN: Er, Glenys Kinnock we’ve got, and Sebastian Coe-

MORRIS: I hate Sebastian Coe!

BREEN: [Getting upset] Well I feel he’s made a very worthwhile contribution-

MORRIS: What, to the paltry sum of fifteen hundred pounds?

BREEN: Yes!

MORRIS: Is that worth six months of your time?

BREEN: Well I think it is-

MORRIS: I don’t think it is at all! I think the only reason you’ve done it is to make yourself look important! How dare you come on this programme and say “Hey look at me, I’m raising fifteen hundred pounds for the homeless”! You could make more money sitting outside a tube station with your hat on the ground even if you were twice as ugly as you are, which is very ugly indeed!

[Breen breaks down in tears. Morris adopts a low, sympathetic voice.]

MORRIS: Has this been upsetting for you? Have you anything else to say in your defence?

[Breen shakes her head. Morris turns smilingly back to the camera - another media lamb slaughtered on the altar of news!]

MORRIS: Janet Breen, thank you!

“I just saw it in the window and couldn’t resist.”

At the beginning of Return of the Pink Panther
Clouseau: The was some question as to whether he or the minkey was doing the beh-ging-k (begging).
Dreyfus: MINKEY??? You said MINKEY!!!
Clouseau: Yes, a Chimpanzee… Minkey

In fact, that whole scene where Clouseau gets chewed out is great.
Pretty much all of Arsenic and Old Lace, but especially…
Reverend Harper: Have you ever tried to persuade him that he wasn’t Teddy Roosevelt?
Abby Brewster: Oh, no.
Martha Brewster: Oh, he’s so happy being Teddy Roosevelt.
Abby Brewster: Oh… Do you remember, Martha, once, a long time ago, we thought if he’d be George Washington, it would be a change for him, and we suggested it.
Martha Brewster: And do you know what happened? He just stayed under his bed for days and wouldn’t be anybody.

And… the whole concept of “Peril Sensitive Sunglasses” in Hitchhiker’s Guide to the Galaxy

From Hapiness of the Katakuris I just love the scene where she is singing to the “sea captain.” It is just so realisticly absurd and random and played so deadpan it just is amazing.

Clerks- “why are we walking like this?”

Futurama- basically the entire episode “Where no fan has gone before”