- There it is again.
- Another quake.
- No, the other sound. I heard it at the pit.

5 seconds sound clip from the Attack of the Crab Monsters (1957) movie soundboard.

You can hear this line at 00:25:01.094 in the DVD version of the movie.

Quote context

[...]

- Doctor, why did you try to stop me from throwing that rock?

- I just don't like to kill anything, even such ugly creatures as these.

- Poor helpless things.

- Helpless nothing. You ever see a bunch of them start on a wounded marine? They finish him off in five minutes.

- That's all the more reason to get Jim out of that pit.

- Yes, all the more reason.

- Now, what do you want with McLane's journal now, honey?

- I just thought I'd look through it and see what it was Mac said about those great caves appearing in the sides of the hills.

- Well, he didn't say much, except that it always happened at night.

- It was right in here.

- There it is again.

- Another quake.

- No, the other sound. I heard it at the pit.

- You know if we both hadn't heard it, I'd swear it was my own imagination.

- Dale, what can it be?

- I don't know, but I'm gonna find out. Now, stay here, Martie.

- Don't go in there!

- Put out the lights.

[...]