My brother in laws sister got killed in a car crash when she was 17 ,about 40 years ago , my brother in law was 6 or 7 ... About a year after she was killed him and his brother was playing up indoors , from memory he threw something at his brother, thier dad jumped up and chased him out to the hallway ,he went to run up the stairs and stopped dead in his tracks and so did his dad, he saw a shape of a girl standing at the top of the stairs, he shite himself and ran back down into front room, his dad said he must of imagined it and that he didn't see anything ... Any way years later his dad said he did see it , he didn't admit to it at the time as he didn't want to alarm my brother in law any more than he already was.... Now I know this isn't made up , cause I know the people involved and they definitely wouldn't make it up .