Mine was an old movie from the 60's - could have been The Haunting on Hill House.
There is a scene where two women are sharing a room in an old house. They are in twin beds. In the middle of the night, they are awakened by strange noises or movements in the room. Due to their fear, they reach out to hold hands across the room between their beds. When they wake up the next morning - the beds are too far apart for them to be able to hold hands. SOMETHING ELSE WAS IN THE ROOM BETWEEN THEM HOLDING EACH OF THEIR HANDS.
To this day - I cannot sleep with my arm extended off the bed.
