Theo watched the sandwich drop then didn't raise his head; he didn't feel he could when Greg raised his voice at him, waiting only for the rippling pain of the cruciatus to rip through him in the next moment, because that was what happened when people were angry at him, surely.
He wasn't going to eat. He wasn't. No matter how broken Greg seemed to sound, although he winced, visibly, at the idea of being put under Imperius. He didn't think that Greg would ever do that to him, but he'd been proven wrong about what he thought he'd known before.
He kept his head down, staring at but not seeing the sandwich, his stomach turning at the idea of eating, at the idea of being forced to eat under Imperius, at the wait for the punishment coming his way.