We were all able to see the figure of a man clearly through the curtains, he   leaned forward and knocked on the window.  My father believing this to be one   of my older brothers friends instructed my brother Alex to see who was   knocking at the window.  Alex opened the door, looked to his right and paled   then responded; dad there's no one on the porch.  we all thought he was   kidding. we could clearly see the person knocking on the glass.  my father by   then irritated went to the door.  he told us, no one is on the porch and   there are no footprints in the snow!  the guest was still knocking on the
  window!  my mother a devout catholic frightened believed the silhouette to be   the devil began to pray.  the rest of us kids just sat there staring.  we   were too frightened to move! dad slammed the door and ushered us into the   living room where we stayed for the remainder of the evening.  the figure   continued to knock on the window for several minutes and then just stopped.