But if you were surprised, that would surprise me.

3 seconds sound clip from the Love Affair (1939) movie soundboard.

You can hear this line at 00:08:21.509 in the Blu-ray version of the movie.

Quote context

[...]

- Can you imagine? Nine days like that? This is terrible. That's not for me.

- Life should be bright. It should be beautiful and bubbling, like pink champagne.

- I got scared. I said to myself, Don't beautiful women travel anymore? Evidently not. Then I saw you and it was all right. I was saved. I hope.

- Cigarette?

- No, thank you.

- Have you been getting results with a line like that? Or would I be surprised?

- But if you were surprised, that would surprise me.

- That sounds like a nasty crack. I could make a few too if I felt like it.

- I'm sure you could.

- I know I can.

- That's what I said. I think I will.

- How's your fiancée?

- She's got a cold. Oh, that's too bad. Got it at Lake Como?

- No. No, she wasn't there.

- Oh, you mean the lady of the lake was not...

- That was her best friend.

- Oh.

- Chummy bunch.

- Yeah.

[...]