- You talking to me, Mark, or something out there?
- Both, David.

5 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.

You can hear this line at 00:45:56.804 in the Blu-ray version of the movie.

Quote context

[...]

- Could be he's dead from the wound.

- Then again, maybe the rotenone isn't going deep enough.

- Maybe we should fix the rotenone to sink deeper down, eh?

- Yeah. Anything is worth a try.

- What was that?

- I don't know.

- Come on. Come on.

- You talking to me, Mark, or something out there?

- Both, David.

- They won't believe it back home, none of them. I wouldn't have believed it myself. Sitting out here, waiting for some monster to appear. That's why we've got to take him.

- Why won't they believe?

- Because we deal with known quantities, with knowledge we've accumulated up to now.

- We've just begun to learn about the water and its secrets, just as we've only touched on outer space.

- We don't entirely rule out the possibility that there might be some form of life on another planet. Then why not some entirely different form of life in a world we already know is inhabited by millions of living creatures?

[...]