Queen visits a mental hospital. Gets shown around by the ward Sister. She sees all sorts of conditions and all types of treatment.
Eventually, exhausted by all the visiting and chatting to the less violent of the inmates, she asks to be shown the garden.
Sister takes her around the beautiful gardens. Eventually she meets a young man, quietly tending a decorative border. She stops and chats to him. He is very clear and cognisant, and engages her with discussions on the merits of the different plants he's tending.
After 5 minutes talking, she asks why hes there. He tells her that he doesn't know but no matter how he tries, he can't get out. She assures him she'll take it up with the supervisor.
The man thanks her and she gets up to continue her tour. She gets 5 yards from the man when she get hit in the back of the head with a brick!
Man shouts " You won't forget now will ya?"