Some workmates and I were taking a little break talking about Airplane! and some of the classic lines. I found the script on google, so here are some good ones:

Joey : I think you’re the greatest, but my dad says you don’t
work hard enough on defence. And he says that lots of
times, you don’t even run down court. And that you
don’t really try . . . except during the playoffs.
Murdock : The hell I don’t!! ( grabs joey by collar ) LISTEN KID!
I’ve been hearing that crap ever since I was at UCLA.
I’m out there busting my buns every night. Tell your
old man to drag Walton and Denier up and down the
court for 48 minutes.
…….

Oldlady2: Oh… its my stomach. I haven’t felt this awful since
we saw that Ronald Reagan film. uhh.
…….

MCrosky : MAYDAY? What the hell does that mean?
Johnny : Mayday? Why that’s the Russian New Year. You know,
we’ll have a big parade, we’ll serve hot hor’doevres

Here’s another link to some pictures and sound files.