- She's on the brink, and you know it.
- I don't know it.

6 seconds sound clip from the Attack of the 50 Foot Woman (1958) movie soundboard.

You can hear this line at 00:04:29 in the Blu-ray version of the movie.

Quote context

[...]

- Well, they've got some fancy name for it.

- Mostly, she'd have these violent headaches. Then she'd get falling down drunk. Still has them to this day.

- What are you getting at?

- Oh, come on, now, Harry. Let's not be naive.

- You've made a good start. Now follow through.

- She's on the brink, and you know it.

- I don't know it.

- This Dr. Cushing seems to be helping her a lot.

- She's tapering off on the bottle, too. Hardly took a drink all evening. You saw her.

- All she needs is a little help. Play the husband, right to the end.

- Once she's in the booby hatch, throw the key away.

[...]