Uh, I don't really know what I'm on.

4 seconds sound clip from the Before Sunrise movie soundboard.

You can hear this line at 00:07:12 in the Blu-ray version of the movie.

Quote context

[...]

- Ah. How is she?

- She's okay.

- She's all right?

- She's fine, yeah.

- How about you? Where are you going?

- I'm going to Vienna.

- Vienna? What's there?

- I have no idea. I'm flying out of there tomorrow.

- Ah. You're on holiday?

- Uh, I don't really know what I'm on.

- I'm just traveling around. I've been riding the trains the past two, three weeks.

- Mm-hmm. You were visiting friends or just on your own?

- Yeah. I had a friend in Madrid, but, um...

- Madrid? That's nice.

- Yeah, I got one of those Eurail passes, is what I did.

[...]