Not exactly educational, but director cameos could be fun. Here's a classic:

Chinatown (Roman Polanski)

Man with Knife: You're a very nosy fellow, kitty cat. Huh? You know what happens to nosy fellows? Huh? No? Wanna guess? Huh? No? Okay. They lose their noses.

http://www.youtube.com/watch?v=8SPakQ7hH6I

And a few other fun ones.

Badlands (Terrence Malick):

http://www.youtube.com/watch?v=phv5ZMRVn4w

Taxi Driver (Martin Scorsese):

http://www.youtube.com/watch?v=A8gXs04wqGQ

Dune (David Lynch):

http://www.youtube.com/watch?v=TrjhK0bokdE

Embarrassing seems like an interesting one, but I can't think of one for some reason.

Or.... Extracting Information / Interrogation Scenes:

French Connection: “Ever pick your feet in Poughkeepsie?”

http://www.youtube.com/watch?v=Zd5wCpR8Cg4

A Fish Called Wanda: “Well Ken, I'm gonna ask you some questions while I eat my chips.”

http://movieclips.com/zRBd-a-fish-called-wanda-movie-fish-and-chips/

The Matrix: “As you can see we have had our eye on you for some time now, Mr. Anderson.”

http://www.youtube.com/watch?v=4D7cPH7DHgA

The Dark Knight: “Never start with the head, the victim gets all... fuzzy.”

http://www.youtube.com/watch?v=u8PxG5zvgOM

The Other Guys: “We're gonna do good cop/bad cop, okay?”

http://www.youtube.com/watch?v=hmQAgQyI7Us

Basic Instinct: “I have nothing to hide.”

http://www.youtube.com/watch?v=6J1f1pxT2_E

My Cousin Vinny: “I shot the clerk?”

http://www.youtube.com/watch?v=ppDU4Hon8GA


If you like any of these, I'll dig up the dialogue and will send it to you.

It's been shot down before but I'll try again with some examples.

Factoids in Film: Anytime a character refers to real world facts such as trivia, general knowledge, or subject expertise.

The Apartment (1960)

C.C. Baxter: [narrating] On November 1st, 1959, the population of New York City was 8,042,783. If you laid all these people end to end, figuring an average height of five feet six and a half inches, they would reach from Times Square to the outskirts of Karachi, Pakistan. I know facts like this because I work for an insurance company - Consolidated Life of New York.

Jaws (1975)

Hooper: [to the m.e. and Brody] This was no boat accident!
Hooper: [to Brody] Did you notify the Coast Guard about this?
Brody: No. It was only local jurisdiction.
Hooper: [continues post-mortem] The left arm, head, shoulders, sternum and portions of the rib cage are intact...
Hooper: [to Brody] Do not smoke in here, thank you very much.
Hooper: [lifts up the severed arm] This is what happens. It indicates the non-frenzied feeding of a large squalus - possibly Longimanus or Isurus glauca. Now... the enormous amount of tissue loss prevents any detailed analysis; however the attacking squalus must be considerably larger than any normal squalus found in these waters. Didn't you get on a boat and check out these waters?
Brody: No.
Hooper: Well, this is not a boat accident! And it wasn't any propeller; and it wasn't any coral reef; and it wasn't Jack the Ripper! It was a shark.

Sideways (2004)

Miles Raymond: Let me show you how this is done. First thing, hold the glass up and examine the wine against the light. You're looking for color and clarity. Just, get a sense of it. OK? Uhh, thick? Thin? Watery? Syrupy? OK? Alright. Now, tip it. What you're doing here is checking for color density as it thins out towards the rim. Uhh, that's gonna tell you how old it is, among other things. It's usually more important with reds. OK? Now, stick your nose in it. Don't be shy, really get your nose in there. Mmm... a little citrus... maybe some strawberry...
[smacks lips]
Miles Raymond: ... passion fruit...
[puts hand up to ear]
Miles Raymond: ... and, oh, there's just like the faintest soupçon of like asparagus and just a flutter of a, like a, nutty Edam cheese...
Jack: Wow. Strawberries, yeah! Strawberries. Not the cheese...

@CWillGoWrite "Are you chewing gum?" That's one of my favorite jokes ever.

Factoids could be fun. Here's a classic scene from Rain Man (1988)

Raymond: Yeah, flying's very dangerous. In 1987, there were 30 airline accidents. 211 were fatalities and 230 were definitely passengers.
Charlie: This plane is very safe. Believe me. I gotta get to L.A. I don't have time for this shit.
Raymond: Oh, I don't know. I don't know.
Charlie: You don't know?
Raymond: No.
Charlie: Is it this airline?
Raymond: Yeah.
Charlie: Okay, fine. We can-- There's an American plane.
Raymond: American flight 625... crashed April 27, 1976.
Charlie: We don't have to take American. There's a lot of flights.
Raymond: Pick another airline.
Charlie: Continental. We'll take Continental.
Raymond: Continental crashed November 15, 1987. Flight 1713. 28 casualties.
Charlie: This is very serious.
Raymond: Yeah, very serious.
Charlie: I have to get to Los Angeles. So you're gonna get on that plane. Do you understand me?
Raymond: Yeah.
Charlie: You have to get on a plane.
Raymond: Yeah, get on a plane.
Charlie: Now, there's a Delta.
Raymond: Yeah.
Charlie: It leaves at midnight. How's Delta?
Raymond: Delta crashed August 2, 1985. Lockheed L-1011. Dallas-Fort Worth. Terrible wind shear.
Charlie: All airlines--
Raymond: 135 passengers.
Charlie: All airlines have crashed at one time or another. That doesn't mean that they are not safe.
Raymond: Qantas.
Charlie: Qantas?
Raymond: Qantas never crashed.
Charlie Qantas?
Raymond: Never crashed.
Charlie: Well, that's--
Raymond: Never crashed.
Charlie: That's gonna do me a lot of good. Qantas doesn't fly to L.A. out of Cincinnati. You have got to get to Melbourne...
Raymond: Australia.
Charlie: ...in order to get the plane that flies to Los Angeles. Do you hear me?
Raymond: Canberra's the capital. 16.2 million population.
Charlie: Let's go.

http://www.youtube.com/watch?v=KeYf-rhMQIQ&feature=player_detailpage#t=77s

Factoids could be fun. My mind immediately went to the kid in Jerry Maguire: Did you know the average human brain weighs 8 pounds?

How about factoids this week and extracting information / interrogations next week?

Interesting thing about factoids is they're not so much exposition as just, well... factoids. So what is their purpose? Probably mostly about entertainment, yes? Revealing character?

So for this category, I would think we'd do best to draw a distinction between factoids and exposition, and really try to find good examples of the former.

Yeah, I'm guessing most of these factoid scenes would be just about revealing character or exposition. It will be hard to find anymore depth or purpose to the dialogue.

The Rain Man scene is crucial to the plot since it his fear of flying that sets them off on a road trip by car. And he has this fear because he remembers all these specific facts about the plane crashes. So, the factoids has a purpose to move the story forward.

Good point RE factoids vs. exposition. I fear at least one of my earlier suggestions was exposition. Maybe this scene is better suited...

Three Kings (1999)

Archie Gates: You know anything about gunshot wounds?
Conrad Vig: I don't know.
Archie Gates: Specifically, the worst thing about a gunshot wound, provided you survive the bullet, is something called sepsis.
Chief Elgin: Infection of the blood...
Archie Gates: That's right. Say a bullet tears into your gut. It creates a cavity in the dead tissue. That cavity fills up with bile, and bacteria, and you're fucked.

http://www.youtube.com/watch?v=f8j4GIRYbZw

That's a good scene from Three Kings. If I remember correctly, in the third act, Mark Wahlberg's character gets shot just like it's described here and that creates a nice little ticking time bomb that has to be resolved before he gets sepsis. So, this is a factoid that works as a set-up.

I've voted for factoids before. Voting for it again. I'm betting there's some great sports ones and great heist/caper ones, too.