You're out for a walk in your local park. It's evening, and the gloom of the setting sun illuminates the woods with stripes of orange and yellow.

About halfway into your walk, when you're just about ready to start walking back home, you notice that everything's gone dark - not even the street lamps are on. What's more, a pair of white, glowing eyes lurks only about 9 or 10 meters away from you...