Some background: As a child I lived with my mother and her parents. I'm very close to my grandmother and was close to my grandfather until he died. In the years leading up to his death my grandfather suffered from a protracted illness.
Shortly after my grandfather died and for years afterward I had a series of recurring dreams, all variations on the following: I'm at my mother's place. My mother, grandmother, and grandfather are there. Problem: My grandfather is dead. I know this because I was at the hospital with him hours before he died, was at the viewing in the funeral home, and was at the funeral itself. I ask my mother and grandmother what's going on. They don't know what I'm talking about. I ask my grandfather but he can't speak. I look at him and I know that he is dead. He may be walking around, but he has the look of the dead, the several days dead, about him. And he can't speak. And he looks confused.
This is where the dreams would vary: Sometimes I woke up at this point. Sometimes it would continue. When it continued, it was always the same - I would have to kill my grandfather. The details aren't important. By the end of the dream he would be dead for the second time. Sometimes there would be a second funeral, sometimes not.