"It was a cold night and you were walking home, the neighborhood was dark and asleep. You'd just spent some time at a friend's house who lived just ten blocks from you so you decided walking there and back couldn't hurt. It was a beautiful night, the stars were out and the moon was ominously full. You could see your breath as you kept walking home. Suddenly you hear footsteps behind you. Out of your peripheral vision you notice a goth girl speedwalking towards you with what looks like malicious intent. Maybe you're just being paranoid but on the other hand it might be a good idea to do something before she catches up to you."