Not a movie, but a BBC Christmas ghost story...BBC used to produce a ghost story at Christmas. The Brits like to blend creepy ghost stories in with their Christmas celebrations. Anyway, it's "Whistle and I'll Come to You." It is based on the M R James story of the same name. IMO, James was simply the best ghost story writer in the English language. The film is only about twenty minutes long. The actor Michael Hordern played the lead and he did a fantastic job. He really conveyed the deepest fear when he realized he was dealing with something not rational, a ghost in fact. The final scene, in which the ghost has followed him back to his hotel room and manifests itself by raising up and forming the sheets on the extra bed into a body of sorts, just zinged me. James made his ghosts malevolent and capable of harming/killing people, which is unusual for English-language ghost stories. Truly scarey shit, ghost stories for adults.