spsimmons

Mine had to have been during Happy Gilmore when Chubb showed his hand that got bit off by the alligator. I don't know if it was because it was super hilarious, or I was hopped up on Ephedrine. Probably a combination of both.

Superman07

Wasn't me, but I'll never forget a friend losing it watching Dumb and Dumber. He lost it so much during the snowball scene, that he fell off the couch doubled over crying with laughter.

mortalplague

The whole In The Loop movie had me rolling. Every scene with malcolm and the dinner scene where he tries to defend his cheating by claiming he did it to stop the war. Also Four Lions was absolutely hilarious.

Charlie Goose

All the Tony Clifton scenes during Man on the Moon, but especially the one on the set of Taxi.

In Dodgeball, after Missi Pyle as the Russian brute destroys the guy in the bar with a ball, Justin Long whispers, "I think that guy might really be dead!"

Gene Wilder and Richard Pryor reacting to the monster Grossberger in their cell in Stir Crazy.

The Little Seymour scene from Uptown Saturday Night.

Any one of a dozen classic Abbott & Costello bits, but especially the drill scene from Buck Privates or the Susquehanna Hat Company bit from In Society.

Traxan

South Park: BLU. OMG that was insanity.

Axeramm

The Man Who Knew Too Little - One of my favorite Bill Murray movies.

Loc Nar

The one I remember most vividly is the "You're going the wrong way!" scene from Planes, Trains and Automobiles. Such a great slow build. About 1:20 in the clip is where I started to lose it - tears, snorts, doubling over - everything.

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mattysemo247

Kung Pow

Groucho

"Propeller Guy" in Titanic

Noonan

In recent memory, probably Pineapple Express.

johnnysd

I love Jane Lynch.

dom56

Pink Panther Strikes Again laughing gas scene. I dare you not to laugh.

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LiquidSky

Years ago (stoned, naturally ) watching the teen comedy "Hollywood Knights". There's a scene with a nerdy guy and his mother in a car singing songs from "Fiddler on the Roof". That set me off so hard that I actually cried. LOL

Alan Smithee

At the risk of losing all my credibility: Billy Madison and Clerks 2.

DaveyJoe

If I were you I'd disown that post and wash my hands of it entirely.

UAIOE

Him butchering the national anthem has me tearing up from laughter.


I always loved the part where he asks the guy how tall he is, then he says "Jesus Christ! I didn't know they could stack shit that high!"

Obey The D

The Paul Rudd mirror scene from Wanderlust had me rolling:

NSFW language:

dstrauss

I don't know why (it's only sort of funny now), but the hardest I ever laughed at a theater actually came the first time I saw the trailer for Baseketball. When Bob Costas yells out at the end, "You're excited? Feel these nipples!" I remember literally falling on the floor with tears falling down my face I was laughing so hard.

Nick Danger

I saw Monty Python and the Holy Grail in a packed theater. Everyone was in hysterics by the time a moose once bit my sister. We never stopped.

The only thing close to it was the Kentucky Fried Movie / Groove Tube double feature that all the guys from my dormitory floor saw together at a beer theater. There wasn't a dry eye in the house during Catholic High School Girls in Trouble.

Super X

Highlander 2: The Quickening. I'm sure it was not the intended reaction.

Ranger

The Mrs Doubtfire telling off the mugger bit is a great one.

Two parts from Dumb and Dumber:
- Harry is choking Llyod who screams out "Harry... your hands are freezing!"
- The lady is reunited with her husband and suddenly Llyod becomes enraged and starts shooting at him but he wakes up.

Transformers:
- where the soldier tries to make a phone call and rushes out to get a credit card. Well, it was very funny the first time.

Full Metal Jacket: "Wipe that smile off your face!"

TheStoicPaisano

"You can't SPELL motherfuckin' technology."

GoldenJCJ

When I was about 11 years old seeing Home Alone for the first time I remember laughing hysterically at Daniel Stern's scream when he has the tarantula put on his face.

PatD

Clerks.

I had never seen (up to that point in my life) such a unabashedly, inventively crude and filthy-minded comedy all my life. I loved it. "What's a jizz mopper?"

ranjan82

-Shaun of the Dead
-Date Night
-Role Models
-Step Brothers (pretty much any Will Ferrell movie)
-Pineapple Express and Judd Apatow movies in general
-Kevin Smith movies