I do take my responsibilities as seriously as you, you know. You do your job and let me do...

Ripley:
That's amazing. What is it?Ash:Uh, yes, it is. Um. I don't know yet. Did you want something?Ripley:Yes, I, uh... have a little talk. How's, uh, how's Kane?Ash:He's holding, no changes.Ripley:And, uh, our guest?Ash:Um.Ripley:Hm?Ash:Well, as I said, I'm still... collating, actually, but uh, I have confirmed that he's got an outer layer of protein polysaccharides. Has a funny habit of shedding his cells and replacing them with polarized silicon, which gives him a prolonged resistance to adverse environmental conditions. Is that enough?Ripley:That's plenty. What does it mean?Ash:Please don't do that. Thank you.Ripley:I'm sorry.Ash:Well, it's an interesting combination of elements making him a... tough little son-of-a-bitch.Ripley:And you let him in.Ash:I was obeying a direct order. Remember?Ripley:Ash. When Dallas and Kane are off the ship, I'm Senior Officer.Ash:Oh, yes. I forgot.Ripley:You also forgot the Science Division's basic quarantine law.Ash:No, that I didn't forget.Ripley:Oh, I see. You just broke it, hm?Ash:Look, what would you have done with Kane, hm? You know his only chance of survival was to get him in here.Ripley:Unfortunately, by, uh, breaking quarantine, you risk everybody's life.Ash:Maybe I should have left him outside. Maybe I've jeopardized the rest of us, but it was a risk I was willing to take.Ripley:That's a pretty big risk for a Science Officer. It's, uh, not exactly out of the manual, is it?Ash:I do take my responsibilities as seriously as you, you know. You do your job and let me do mine, yes?