There was only one left.

Henry:

You telling me you never killed anybody before? Otis:
I ain't saying that. Henry:
Then you've killed before, right? Otis:
Well, maybe I didn't have no choice. Henry:
You didn't have no choice here neither. Did you? Otis:
Huh? Henry:
Did you? Otis:
I don't know. It ain't the same. Henry:
It's always the same... and it's always different. Otis:
What do you mean? Henry:
It's either you or them one way or the other. Ain't that right? [pause] Henry:
Open your eyes, Otis. Look at the world. It's either you or them. You know what I mean. Otis:
Yeah. Henry:
Good. You wanna beer? Otis:
Okay. Henry:
Okay. [Henry walks out of frame. Sound of fridge doors opening offscreen. Henry returns, carrying a beer can. He rips it open, sits back next to Otis and takes a sip. Otis looks at him. Henry swallows, let's out a sigh] Henry:
There was only one left. [Henry offers the can to Otis, who takes it and drinks]