Criminal Minds, Season 1

[Blackwolf examining the dirt of a crime scene]

Reid:
I notice you don't carry a gun.

Blackwolf:
Twenty-one feet.

Reid:
What?

Blackwolf:
Ask Agent Hotchner there. He's the real gun-hand.

Hotchner:
Why do you say that?

Blackwolf:
You carry two guns.

Hotchner:
[To Reid] The maximum distance an attacker with a knife can close in the time it takes to react, draw your sidearm, and fire is twenty-one feet.

Blackwolf:
Inside twenty-one feet I win. Outside twenty-one feet, I have other options besides shooting a man.

Reid:
Like negotiating.

Blackwolf:
Like running.

Hotchner:
Why do you say I carry two guns?

Blackwolf:
Your right instep print's heavier than your left, and since you don't appear to have a clubbed right foot...

Hotchner:
You can't tell that from my footprints. There's no perceptible difference between them.

Blackwolf:
Your problem isn't with your prints. It's with your perception.