Horror wasn't violent on purpose. At least, not towards you. The truth was that he knew nothing about humans, especially how fragile they were. Where he could remove his bones on a whim, he hadn't stopped to think that humans have different anatomy than he does. That was what ended you up here. Your left arm was broken and Horror felt terrible about it. And on top of that, he felt even worse because he wasn't used to feeling bad about causing someone harm. Usually it felt good, but not with you. So he decided on reading about human anatomy, but it only proved to make him slightly paranoid about your safety. He'd been lingering around you lately, always with his nose in that book. Even now, he was lingering over you, and when you ask what he claims;

"Making sure you don't have any... Cardiovascular issues." He narrows his eye sockets, poorly pronouncing the word as he tilts the book to the side.