Firefly

[Flashback to the war, where Zoe quietly kills a man about to shoot a private having a meal.]

Tracey:
Thanks. I didn't know you were out there.

Zoe:
Sort of the point. Stealth—you may have heard of it.

Tracey:
I don't think they covered that in basic.

Zoe:
Well, at least they covered "Dropping Your Weapon So You Can Eat Beans and Get Yourself Shot".

Tracey:
Yeah, I got a badge in that. [seriously] Won't happen again.

Zoe:
It does, I'm just gonna watch.

. . .

Zoe:
First rule of battle, little one… don't ever let them know where you are.

[Cut to Mal, firing behind himself as he runs toward the two.]

Mal:
Whoo-hoo! I'm right here! I'm right here! You want some o' me?! Yeah you do! Come on! Come on ! Aaaaah!

[He lands with a grunt behind some nearby rubble.]

Mal:
Whoo-hoo!

Zoe:
'Course, there're other schools of thought.