The neverending story

"Hellooooooooo!" you shout through the trees. "Anybody there?"

You pause and listen for a reply. The rustling has stopped. Suddenly, the forest errupts in a flurry of activity. Several men dressed in kevlar plating and carrying assault rifles surround you.

"Down on the ground now!" shouts one of them, the apparent leader of the group.

What do you do?