My friend and I had a similar reaction when we saw Coming To America in the theater during the scene where Eddie Murphy gives the two homeless guys a ton of money and the one says "Mortimer!  We're back in business!"  If you hadn't seen Trading Places you would have NEVER gotten the reference (and we could tell several hadn't just by the looks we got when we were laughing).

 Python always gets me laughing. Some of Mr. Beans stuff is funny to me. The Pink Panther scene regarding the dog is one of my favorites. I always thought the Pink Panther balloon scene was funny too. In one of the more recent Pink Panther movies there is a scene where the inspector goes into a sound studio and ends up in a recording space. He decides this is a good place to get rid of a little extra ballast. What he doesn't know is that he is miked up live. Some of those others I'm less familiar with. Looks like I have some things to check out.
 
 FWIW I checked out that new scifi. If you ever get queasy flying then you don't want to watch this in 3D IMAX. The special effects in this movie are incredible. The sound in that theatre was also some of the best I have ever heard. The tracks would go from something so loud that it borders your hearing threshold and then the sound drops to nothing. The mix on this movie is also incredible. If you see it I highly recommend trying to see it in IMAX if you have it in your area.

 
 The plot was a little over the edge on the believibility scale. I don't want to ruin it so That's all I'll say.

James Woods' character's response in "Contact" when the Feds are discussing the significance of the first contact being a re-broadcast of Hitler's speech at the opening of the Berlin Olympics:
 
Rachel Constantine: [about Adolf Hitler] Twenty million people died defeating that son of a ****, and he's our first ambassador to outer space?
Ellie Arroway: Actually the Hitler broadcast from the...
David Drumlin: [interrupting] '36 Olympics was the first television transmission of any power that went in to space. That they recorded it, and sent it back, is simply a way of saying "hello, we heard you.
"Michael Kitz: Or, "Sieg Heil, you're our kind of people."

The Australian movie "The Castle" has many good lines. I like the exasperated lawyer, Denis Denuto, arguing with his photocopier:"I'm PRESSING f___king F1!". Really sums up photocopiers nicely. http://www.youtube.com/watch?v=KnN7U9Q8pvQ

Well My favorite is "Where is my dress?" ..This is my favorite....Check out

Kalle Rantaaho
" Life is a mans best time!"
(Ski-jumper Matti Nykänen, not a movie line. My translation isn't snappy enough, though)

For those guys, it's not the fall that's dangerous, it's the sudden stop.