Let’s say you’re wondering what “Ordinary People” would be like if it took place on a farm in Montana instead of some WASP enclave in Connecticut (let’s just say, because we know you’re not). Well, your pretend prayers have been answered with “The Stone Boy” (1984). Brother dies accidentally, other brother feels survivor guilt, everybody else goes batshit crazy. Except grandpa (Wilford Brimley). He’s so even-keeled, he could look death in the face and sell it a reverse mortgage. Anyway, it’s an interesting film in that it portrays an adolescent with PTSD before we knew what those letters stood for.