Singin' in the Rain1952

[During a test screening of "The Duelling Cavalier," with Don playing Pierre and Lina playing Yvonne]

Yvonne:
Oh, Pierre! You shouldn't have come. You are flirting with danger! They will surely find you out. Your head is much too valuable!

Roscoe Dexter:
[to R.F.] She never could remember where the microphone was, boss.

Pierre:
T'was Cupid himself who called me here. And I, smitten by his arrow...

[Pierre begins exaggeratedly moving around the set, and addresses his dialogue to the camera rather than Yvonne, causing the audience laughter to drown out his dialogue]

Yvonne:
The night is full of our enemies. [lightly hits Pierre with her fan, generating several loud thuds]

Boy in audience:
Hey, Lina, what are you hitting him with? A blackjack?

Pierre:
I love you.

Yvonne:
Oh, Pierre...

Pierre:
[starts kissing Yvonne up her arm, as the audience laughter grows louder] I love you! I love you! I love you! I love you! I love you! I love you! I love you! I love you!

Man in audience:
Did someone get paid for writing that dialogue?