Stranger Things icon David Harbour finally believed in ghosts after his experience filming the movie We Have a Ghost. Almost everybody has a supernatural tale to tell, whether it’s something they believe they experienced firsthand or a paranormal tale that happened to a friend. Or even a friend of a friend… of a friend. Hollywood has its fair share of stories, and not all of them make it into screenplays. One of them belongs to David Harbour, an American actor whom audiences will know and love thanks to his role as Jim Hopper on the wildly popular TV series Stranger Things. Jim has grappled wi…