Apparently, she saw an alien once.
4 seconds sound clip from the Aliens (1986) movie soundboard.
You can hear this line at 00:29:39 in the Blu-ray version of the movie.
Quote context
[...]
- I'm talking about breathing, not this frozen shit.
- All right. First assembly's in 15, people. Shag it.
- Hey, mira. Who's Snow White?
- She's supposed to be some kind of consultant.
- Apparently, she saw an alien once.
- Hey, Vasquez. Have you ever been mistaken for a man?
- Ha, ha! Oh, Vasquez. You're just too bad.
[...]