Then go and stop them.
2 seconds sound clip from the It Came from Outer Space movie soundboard.
You can hear this line at 01:15:26.531 in the Blu-ray version of the movie.
Quote context
[...]
- Let the others go. I'll try and hold off the mob.
- And if you fail? No. We'd rather have it end here, than fall into their hands.
- Wait! You speak of how wonderful it was going to be to know other worlds.
- Is that the way you want it? When there might still be a chance?
- Free the girl first. Show the mob you mean them no harm.
- You can always reach out and destroy us with that.
[...]