Once she's in the booby hatch, throw the key away.
6 seconds sound clip from the Attack of the 50 Foot Woman (1958) movie soundboard.
You can hear this line at 00:04:45 in the Blu-ray version of the movie.
Quote context
[...]
- You've made a good start. Now follow through.
- She's on the brink, and you 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.
- That'll put you in the driver's seat.
- You'd make a wild driver, Harry... With 50 million bucks.
- Harry! Harry! Harry, help me!
- Mrs. Archer! Mrs. Archer, what's the matter?
[...]