Suddenly you hear something rapidly approaching, but you can't tell whether it is coming from in front of you, above you or from behind...all you hear is a whoosh and you're frozen with fear...until BAM, you are hit hard in the head and fall to the ground unconscious.
You slowly wake up a little while later next to a strong and warm fire blazing near you. You slowly get up and while you crawl over towards the fire a booming voice erupts loudly echoing across the walls of the cave so much so that you can't tell whether it really is in the cave or just inside your pounding head.
"You have trepassed upon our sacred ground here in this cave, stranger. Yet, I sense that you did so only motivated by a genuine sense of curiosity. Here we have stayed hidden by day, only venturing out at night for the past few centuries and you are the first human in 150 years to enter our midst."
You shout into the abyss, "Who are you? Where am I?" And as you watch the fire you see something moving into the edge of the firelight, glancing quickly up you see that it is...