Well, I won't go back on him.
2 seconds sound clip from the King Kong (1933) movie soundboard.
You can hear this line at 00:36:42.651 in the Blu-ray version of the movie.
Quote context
[...]
- I think Denham's off his nut taking you ashore today.
- Well, I was a little scared.
- Hmm. I guess you weren't the only one.
- That's just what's worrying me.
- Well, after all he's done for me, I'd take any kind of chance for him.
- Don't talk like that. He's crazy enough to try anything.
- Well, I won't go back on him.
- When I think what might've happened today...
- If anything had happened to you...
- Then you wouldn't be bothered with having a woman on board.
- Don't laugh. I'm scared for you. I'm sort of... Well, I'm scared of you, too.
- Ann... Uh... I, uh... Uh... Say, I guess I love you.
[...]