John and Dean in “Unfinished Business”

John

Y'all may have treated me like a fool, but I am not useless. I can draw a damn, whatever it is - a sigil.

Dean

Why don't you go help Sam out? 'Kay? 'Cause this has got to be done in... it's gotta be done in human blood.

John

[cuts his hand open] So? How big?

Dean

I'll show you. [laughs softly]

John

What?

Dean

All of a sudden, you really remind me of my dad.