Mine is in “House of 1,000 Corpses” directed by Rob Zombie.
When you put the DVD in, just leave it there. The guy that stars as the gas station/ freak museum/clown fetishist eventually starts to insult you for waiting to hit play. Funniest damn extra I’ve ever seen.
Any others I may have missed?
The “Mattress Man Commercial” from Punch-Drunk Love. The GF and I watched it probably ten times the first time we saw it, and in fact I’m laughing out loud right now just thinking of it.
I’d say more but I don’t want to give anything away; it needs to be a surprise.
The rendition of the “Camalot” song in Monty Python & the Holy Grail done with stop-motion Lego figures. 
Also from the Holy Grail, the “subtitles for people who don’t like the film.” Basically, you turn this on, and the movie is subtitled - with quotes from Shakespeare. But someone actually took the time to search through all of Shakespeare’s works and attempt to match up the Shakespeare lines to the movie dialogue lines. Highly amusing.
DAMN IT!!
you beat me to it!
Then there’s the DVD version of UHF, which is two-sided and has different bonus features on each side of the disc. If you pick a feature that’s on the other side, “Weird Al” comes out and politely tells you to turn the disc over to access the feature. Keep doing it, though, and Al gets angrier and angrier each time…
Monster’s Ball, oddly enough. There’s a scene in which Mos Def’s character is warning Thornton’s character not to scare his boys again. In the out takes, Thornton’s saying some very funny shit.
‘Finding Nemo’ had some darned funny extras. The deleted scenes with Dory adlibbing a more lines from the scene when she’s asleep and muttering was especially funny, and the one with Marlin’s various punchlines to the longwinded joke that he’s attempting to tell throughout the movie.
I’ll second the ‘Subtitles for people who don’t like the film’ on Holy Grail. Holy cow, that must have taken some research.
The commentary on ‘The Adventures of Buckaroo Banzai’ includes a variety of answers to the question, ‘Why is there a watermelon there,’ including the correct one, which was that the director stuck it in to verify his suspicion that no one from the movie company was even watching the dailies any more.
The easter-eggs on both the Lord of the Rings movies.
And William Shatner’s commentary track on the gloriously obscure ‘Incubus.’ “We all wanted to make ‘Star Trek’ entirely in Esperanto, but Nimoy was too lazy…”
No mention of the commentary track on This is Spinal Tap? I’m shocked!
I was watching “American Splendor” this weekend and at the end of the movie, went to the special features menu. It is set up like the menu board at a drive through, as it would look through a car window. However, if you don’t choose something right away, a voice begins speaking asking the guy in the car for this order, and saying things like “Sir, I can hear you. What’s your order?” until it eventually becomes a convesation between the nerd from the movie and the guy asking for the order. Rather amusing.
I’m not sure how long it goes on, but I sat there for a couple minutes listening to it.
“Would you like something to drink?”
“I’d like a pina colada”
Two favorites, so far:
Once Upon a Time in Mexico
At the end of the extremely educational “Ten Minute Cooking School” extra, in which Robert Rodriguez (who is my new boyfriend, btw) shows us how to cook the pork dish that Johnny Depp’s character would (literally) kill for, at the end of the credits we get: “Coming Soon:/Ten Minute Fucking School.”
Cabin Fever
Among the choices offered on the extras menu are “ChickVision,” in which all the really gory scenes are jumped over. (The joke being that this would make the movie about 9 minutes long), and “Family Version,” which begins with the director (my other new boyfriend) introducing the movie in a kind sugar-gloopy children’s show host manner. Then the film starts. We see the opening scenes of the the kids in the convertible; golden sunshine, windtossed hair, big smiles–and then–“The End.” Hoot hoot hoot.
The bloopers in Toy Story 2 involving Weezy the Penguin and Mr. Microphone.
On the Kevin Smith DVD (the one where he’s speaking at various colleges) if you just sit on the menu Smith does some funny stuff while just standing there. It goes on for about 10 minutes.
Everything on Rejected. (Short animated craziness. Everyone should own this movie) Especially the page that just has a creepy noise that repeats over and over.
The deleted scenes from the first Austin Powers movie.
The goofs part on the Shrek DVD, where the rendering went wrong. The Big fluffy donkey makes me laugh my ass off every time.
Boogie Nights. The deleted and extended scenes are nearly all gold. The recording session, the argument with the recording studio owner, the guys snorting coke shot through the glass coffee table…
Scrat’s Missing Adventure, from the Ice Age DVD.
I swear, that little rodent was the funniest thing about that movie. If they’d just done his adventures for 80 minutes I’d be dead from laughter.
The MST3K DVD for Sidehackers. The menu has Joel singing the “theme song” of the movie while playing a keyboard. “Nothing lasts foreeevvvveeerrr. Only Loooooove. Only love…”
It cracks my shit up every time.
Ah, that reminds me!
Don’t forget the undersea documentary with Jean-Paul Cousteau, with additional comments from Dory, Marlin, and Nemo. Not only do you get Hot Naked Live XXX coral sex (“Daaaaaad!” “When you’re older!”), but you also get that !#@^!%#!?@ trumpet fanfare throughout the whole thing.
“…Papa never had this problem…”
Our DVD collection is still pretty small, but so far I’d have to say mine is on Back to the Future: “The bitch is cheating, man!” (More I cannot say.)