When I was growing up in England in the 1970s, I was taken to the cinema and saw a trailer for a film that I have never been able to identify. All I can remember is a man lying on the floor (I think he is dead) possibly in a coffin, and he is talking about himself. Someone or something is looking in at him from a window. I know this is not much to go on (it was only a trailer) but I am quite sure it was a horror film. If anyone can help me I would very grateful as it has been puzzling me for years. As I have said, if anyone has a knowledge of obscure 1970s horror films please contact me.