THE DIAMOND ROOM
Shiny!
The room's floor is half paved in diamond... and you can even see an open door on the other side! However, on the other half of the floor there is a checkerboard of square steel plates about the size of your foot, and squares covered in large, sharp, deadly looking spikes. Also, across the middle of the room, at about waist height, there is a belt-action, diamond coated bandsaw belt, running at full power. How the hell are you going to get out of this one?
P.S. Look back through the rooms - this room will not solve itself.