Psych, Season 5

Gus:
Uh, what is going inside the syringe?

...

Shawn:
Gus, do you really want to know?

Gus:
Yes, Shawn. I'm very particular about what goes into my body.

Shawn:
It's probably safe to assume it's something lethal. Is that accurate?

Yin:
A box of Mars Bars to you, Shawn.

...

Yin:
Now to answer your question, Burton, what we have here is a little concoction I affectionately coined, The Last Kiss. One part cyanide, one part strychnine, two parts atropine, and just a shake--not stirred--of boat cleaner. And it's all for you.

Shawn:
That's not gonna work. I can't watch him die, you'll have to kill me first.

Gus:
You must be outta your damn mind if you think I'm gonna sit here and die after watching you die with some ridiculous grin on your face because you're thinking of sopapillas, or that stupid scene from Summer School where the students all pretend to be dead. [to Yin] And do you have just the one needle? Do you plan on sterilizing in between uses?

Shawn:
Surely you can't be serious.

Gus:
I don't know where all you've been, Shawn!

...

Yin:
Only Burton gets the needle. I have something far more colorful in mind for you, Shawn.

Shawn:
Firing squad? Please say firing squad.