I bet you're wondering how I got here.
2 seconds sound clip from the Love Affair (1939) movie soundboard.
You can hear this line at 01:17:03.478 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, yes, I'm fine. I'm just resting.
- Oh.
- May I?
- Thank you. I will only be a minute.
- You sure you don't mind that...
- I bet you're wondering how I got here.
- Yes.
- That wasn't a very nice way to treat an old friend, was it?
- No.
- So I said to myself, I must apologize. And here I am.
[...]