- Oh, hold it. That ridge will drop right off.
- Off what?
- Come, see for yourself.

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

You can hear this line at 00:17:44.894 in the DVD version of the movie.

Quote context

[...]

- Besides, you looked scared down there.

- I was scared, and lost too.

- You know, Dale, it's funny, but I was using a big black rock as a landmark, but when I swam back, the rock was gone.

- Well, I did see something move near you.

- You did? I wonder what it could've been?

- I don't know. Just a big black shape moving through the kelp.

- Land crabs and seagulls. Everything else is dead.

- Dale! Martha!

- What's the matter, Carson?

- Come up the path, we'll meet you.

- They must have found something. Come on, honey.

- Oh, hold it. That ridge will drop right off.

- Off what?

- Come, see for yourself.

- But only this morning I came along this path on my way to the beach.

- And it wasn't there.

- You mean this pit wasn't here before?

- It has only appeared in the last 20 minutes.

- And it's at least 50 feet deep.

- Nothing but land crabs.

- I want to go down there.

- No.

- Why not?

- You are a geologist. You know that a second disturbance would cause a cave-in that would crush anybody down in the pit.

[...]