I spoke to one of the nurses. She says he spends most of his time lying on his bed. I think it's out of boredom, but Dad says it's because he can't sleep; the man in the bed next to him makes too much noise. "I told him, one more peep out of you and I'll beat you to a pulp" -- hardly the kind of attitude to win him any friends, and definitely not the kind of threat the staff take lightly. They've already complained to my mum, and he's only been there 6 days!
It's early days yet; perhaps he will settle in later. If he doesn't, as awful as it may sound to say it, perhaps he really would be better off dead.