All right, you can take your mask off.
4 seconds sound clip from the Alien (1979) movie soundboard.
You can hear this line at 00:38:12 in the Blu-ray version of the movie.
Quote context
[...]
- Finger. I'm gonna try and get his finger off. Just a minute.
- No, that's not... It's tearing his scalp. I know!
- It's not coming off without tearing his face off with it.
- We'll have to take a look at him inside. Right.
- How come they don't freeze him? How come you guys don't freeze him?
- All right, you can take your mask off.
- What's it got down his throat?
- I would suggest it's feeding him oxygen.
- Paralyzes him, puts him in a coma, then keeps him alive. Now what the hell is that?
- We gotta get it off of him. Just a minute.
- Just a minute. I mean, let's not be too hasty.
- We don't know anything about... it.
[...]