- Can you swear to keep a secret, Ernie?
- At this point, I don't know.
- No, no, you got to swear. You got to, or I just... I can't tell you.
- All right, I swear.
- Good.

11 seconds sound clip from the The Return of the Living Dead (1985) movie soundboard.

You can hear this line at 00:31:38.672 in the Blu-ray version of the movie.

Quote context

[...]

- You have a crematorium, right?

- You wanna burn them?

- Yeah, that's what I had in mind, actually.

- That's cruel.

- I can't think of anything else to do.

- You just can't burn animals alive. It's just too hideous. At least let me kill them first. Take 'em out in the parking lot, and put 'em out of their misery.

- I don't think that'd work, Ernie.

- I don't understand what's going on. Why not?

- Can you swear to keep a secret, Ernie?

- At this point, I don't know.

- No, no, you got to swear. You got to, or I just... I can't tell you.

- All right, I swear.

- Good.

- It's not weasels in the bags. No. No kidding. Look here.

- Oh! Get it off! Get it off! Get it off! Get it off! Frank!

- I'm sorry, Ernie.

- No, it's all right.

- Ernie, we got a... We got a long story to tell you.

[...]