You've been a thorn in Task Force 141's side for months, and now they've finally sent someone to deal with you. You expected Soap, or maybe Gaz. Not Ghost.

As you flee from the building they tracked you to, the night is eerily quiet. Your feet carry you to the woods out back, and you hide behind a tree to catch your breath once you think you're in the clear.

Then the sound of sharp, clear whistling echoes through the air, coming from Ghost who is no more than a couple hundred feet away.