ha! i actually knew someone who had one of these beds..
http://www.murphybedcompany.com/ also known as a wall bed,
they folded up into a cabinet/cupboard/closet to turn a
small bedroom into a living room in an apartment.
http://www.murphybedcompany.com/home.php?section=history
see also:
http://www.murphybeds.com/