Once before you wouldn't believe me.
2 seconds sound clip from the It Came from Outer Space movie soundboard.
You can hear this line at 01:01:50.882 in the Blu-ray version of the movie.
Quote context
[...]
- Then why don't they come out in the open?
- Because they don't trust us. Because what we don't understand, we want to destroy.
- I kill only what tries to kill me.
- This.
- Exactly as you'd destroy anything you didn't understand.
- Don't you see? That's why they've been hiding behind other men's faces until they can clear out.
- Once before you wouldn't believe me.
- When are you going to stop being a badge and become a human being?
- That's my job. A thing is wrong, you set it right.
- Listen to me. They weren't fooling. They need a few more hours.
- If you go to them with men now, they'll kill Ellen! Is that what you want?
- All right, we'll wait. But the responsibility is yours.
[...]