Bullet-Proof

I'm staring at the sight,
The trembling hand and arm.
I'm putting up no fight;
I stand my ground, still calm.

I calculate the spot
At which the fire hits.
I visualise it; hot,
And now the snub-nose spits.

The red-hot venom chasing
My fears and pain inside,
Is like the empty casing;
Spent, and cast aside.

My pulse is surging still,
As I look for the snakebite.
You're waiting for your kill,
And still staring down your sight.

But, you see, I'm bullet-proof;
No slug could take me out.
My breath still raises the roof,
As my Kevlar lungs shout.