Not bad, but it feels like it could use a little more meat. I'm assuming that this guy suddenly was afflicted with this "geological movement tied to personal movement" thingy recently, otherwise it's hard to imagine that he would have escaped Foundation attention all this time.
It's possible that the mental state of your SCP could be an avenue for exploration; all day he cannot move, and is not allowed anything that is really mentally stimulating. Seems like that could drive someone completely insane, and I shudder to think what it would be like. That's assuming, though, that it wouldn't just be easier to keep this guy in a medically-induced coma forever.