Stalag 17 (1953)
A:      Col. von Scherbach (Otto Preminger)
B:      Lt. James Dunbar (Don Taylor)

A:      I'm very grateful for a little company.  You see, I suffer from insomnia.
B:      Did you ever try 40 sleeping pills?

Sunset Boulevard (1950)
A:      First assistant director (Stan Johnson)
B:      Cecil B. DeMille (Cecil B. DeMille)

A:     Norma Desmond is coming in to see you, Mr. DeMille.
B:     Norma Desmond?
A:     She must be a million years old.
B:     I hate to think where that puts me.  I could be her father.
A:     Very sorry, Mr. DeMille.
B:     It must be about that… awful script of hers.  What can I tell her?  What can I say?
A:     I can tell her you're all tied up in the projection room.  I can give her the brush.
B:     Thirty million fans have given her the brush.  Isn't that enough?
A:     I didn't mean to--
B:     No, of course you didn't.  You didn't know Norma Desmond as a lovely little girl of 17 with more courage and wit and heart that ever came together in one youngster.
A:     I understand she was a terror to work with.
B:     Only toward the end.  You know, a dozen press agents working overtime can do terrible things to the human spirit.

The simple numbers - age (real and exaggerated), number of fans, number of press agents give the ordinary dialogue some kind of proportion.

Double Indemnity (1944)
A:     Walter Neff (Fred MacMurray)

A:     I'll tell you what it'd be like if you had that accident policy and tried to pull a monoxide job… We've got a guy in our office named Keyes.  For him, a setup like that would be just like a slice of rare roast beef.  In three minutes, he'd know it wasn't an accident.  In ten minutes, you'd be sitting under the hot lights.  In a half hour, you'd be signing your name to a confession…  Not if there's an insurance company in the picture, baby.  They know more tricks than a carload of monkeys. And if there's a death mixed up in it, you haven't got a prayer.  They'll hang you just as sure as ten dimes will buy a dollar.

Double Indemnity (1944)
A:      Barton Keyes (Edward G. Robinson)

A:      Eh?  There it is, Walter.  It's beginning to come apart at the seams already.  Murder's never perfect, always comes apart sooner or later.  And when two people are involved, it's usually sooner.  Now we know the Dietrichson dame is in it, and a somebody else.  Pretty soon, we’ll know who that somebody else is.  He'll show, he's got to show.  Sometime, somewhere, they've got to meet.  Their emotions are all kicked up.  Whether it's love or hate, doesn't matter.  They can't keep away from each other.  They may think it's twice as safe because there are two of them but it isn't twice as safe. It's ten times twice as dangerous.  They've committed a murder!  And it's not like taking a trolley ride together where they can get off at different stops.  They're stuck with each other and they got to ride all the way to the end of the line and it's a one-way trip and the last stop is the cemetery.