Alcatraz is more crazy than anything you have heard of.
I watched a special on National Geographic and this guy being interviewed was talking about being put into a small contaiment cell that had no light what so ever. He said he would pull a button off his shirt toss it on the ground and than get on his hands and knees and try to find it. And he would do that over and over until he was too tired to do it anymore. Eventually he would go to sleep but he did that day after day to pass the time.
Then they have some dungeon section all the way at the bottom of the prison that is even worse than that which eventually was outlawed from being used.