A young woman was sitting in her living room, watching TV. There was a glass door adjacent to the room. Suddenly, she saw a man at the door. She got scared and called the police.
     It was snowing very heavily that day so when they arrived at her house, they checked outside her house for footprints but found none. Confused, they followed a trail of wet footprints and realized something.
     They told the young she was extremely lucky. The man wasn't standing outside, he was right behind her and what she saw was his reflection.