I remember seeing a movie (I believe in the 80s) where a brother and sister are being held captive by a mountain man in his cabin. In one scene, the man is upset with the boy who is handcuffed or similar, and it’s Christmas Day. He either hits or kicks the boy, and Says, “Merry Christmas”. At the end, I’m pretty sure they shoot him with a shotgun to escape. I also think the setting and time of the movie is not ‘current’, but rather more early to mid-1900s? Any ideas? I used to see this on HBO way back when.