Ripley: When we throw the switches, how long before the ship blows?
Parker: Ten minutes.
Ripley: No bullshit?
Parker: We ain't outta here in ten minutes, we won't need no rocket to fly through space.

Ripley: Whenever he says anything you say "right," Brett, you know that?
Brett: Right.
Ripley: Parker, what do you think? Your staff just follows you around and says "right". Just like a regular parrot.
Parker: [laughs] Yeah, shape up. What are you some kind of parrot?
Brett: Right.

Ripley: Will you listen to me, Parker!? SHUT UP!
Parker: Let's hear it. Let's hear it.
Ripley: It's using the air shafts.
Parker: You don't know that.
Ripley: That's the only way! We'll move in pairs. We'll go step by step and cut off every bulkhead and every vent until we have it cornered. And then we'll blow it the fuck out into space. Is that acceptable to you?

[Ripley has tried in vain to disengage the Nostromo's self-destruct]
Ripley: Mother! I've turned the cooling unit back on. Mother!
Mother: The ship will automatically destruct in "T" minus five minutes.
Ripley: You... BITCH!
[smashes computer monitor with flamethrower]

[The team is eating breakfast after awaking from cryosleep]
Brett: This is the worst shit I've ever seen, man.
Parker: What you say? You got any biscuits over there?
Ripley: Here's some cornbread.
Parker: Cornbread. Yeah.
Lambert: I am cold.
Parker: Still with us, Brett?
Brett: Right.
Kane: Oh, I feel dead.
Parker: Anybody ever tell you you look dead, man?

[after recovering from being facehugged and being impregnated with an alien embryo] Feel like somebody's been beating me with a stick for about six years. [smiles] God, I'm hungry.

[asked if he remembers being facehugged] Just some horrible dream about smothering.

[Attempting to contact Earth] This is commercial towing vehicle Nostromo out of the Solomons, registration number 1-8-0-niner-2-4-6-0-niner. Calling Antarctica traffic control. Do you read me? Over.

[holding Jonesy, the ship's cat, in her lap] Final report of the commercial starship Nostromo, third officer reporting. The other members of the crew, Kane, Lambert, Parker, Brett, Ash and Captain Dallas, are dead. Cargo and ship destroyed. I should reach the frontier in about six weeks. With a little luck, the network will pick me up. This is Ripley, last survivor of the Nostromo, signing off. Come on, cat. [picks up Jonesy and walks to the cryotubes]

[Looking at the dead alien skeleton] Alien life form. Looks like it's been dead a long time. Fossilized. Looks like it's growing out of the chair. Bones are bent outward, like he exploded from inside.

[Preparing to blast the alien out of the shuttle] You are my lucky star... Lucky, lucky, lucky, lucky, lucky.

Danger, the emergency destruct sequence has now been activated. The ship will self-destruct in t-minus, ten minutes. The option to override automatic detonation will expire in t-minus, FIVE MINUTES.

Parker, would you shut up and listen to the man!?

The option to override automatic detonation will expire in t-minus, THREE MINUTES.

The pit is completely enclosed. And it's full of leathery objects, like eggs or something.