- You've seen what one creature like that can do. Just imagine a thousand.
- I have imagined it.

7 seconds sound clip from the The Thing from Another World movie soundboard.

You can hear this line at 01:03:29 in the Blu-ray version of the movie.

Quote context

[...]

- Doctor? Would you mind very much if I... Will you... will you be needing me anymore?

- No. Just finish typing my notes. Return them to me. Let no one see them.

- Doctor. I think you should get some sleep.

- There's too much to do.

- But your mind can't work if you're exhausted.

- My mind's still perfectly clear.

- No, it isn't, doctor.

- You aren't thinking of what's happening there in the greenhouse. He's growing those seeds in there, using blood just as you are.

- You've seen what one creature like that can do. Just imagine a thousand.

- I have imagined it.

- What if that aircraft came here not just to visit the earth, but to conquer it, to start growing some kind of horrible army, to turn the human race into food for it?

- There are many things threatening our world... new stars, comets shooting through space...

- But those are theories. This is an enemy right here.

- There are no enemies in science, professor, only phenomena to study. We are studying one.

[...]