Hopefully this one won't get deleted! I can't believe they didn't include classics such as "Monty Python and the Holy Grail" and "Rocky Horror Picture Show," so here's mine!
MP:
Graham Chapman: Hey, let's try to find the Holy Grail!
(They don't find it; there is much rejoicing)
Audience: Yaaaaay.

RHPS:
Tim Curry:(singing) I'm a transvestite and a transexual! I'm gonna make everyone just like me. Until I do, here's a man.
Professor: Time Warp!
Couple(singing): yay, we defeated the scientist, but now we're lost in time and space!
Audience: I hate it
Another audience: I love it!

Let me know what you think, and please tell me if you can do a better job; I'd love to hear it!
--mpythongirl