Simon/The Chemist and Stiles in “Unfinished Business”

Still a bit feverish, Mr. Stilinski? But, you should know something-- the virus doesn't kill humans. You'll get better. So, don't you think you should tell me where they are? Shouldn't one of you get to live?

Stiles

I think I saw them in the library. Or it might've been the cafeteria. It was definitely one of those two.

[aims his gun at Stiles] I'm going to count to three, and then I'm going to kill you.

Stiles

[furiously] You think you can scare me?

No, I think I can kill you. I just thought the countdown would make it more exciting.