Do you remember the first time you were introduced to a mobius strip and its never-ending looped surface? It was probably during grade school science, and it probably made you rethink everything you knew about the world, the same way this Mobius Chair by Takeshi Miyakawa will make you rethink everything you know about sitting.
The top surface of the chair and its underside are one and the same, so you're technically sitting on the bottom while you're sitting on top. It's enough to drive someone mad, so thankfully it doesn't appear as if Miyakawa has any plans to put the seat into production -- mankind just isn't ready for this kind of multi-dimensional comfort. [Takeshi Miyakawa via designboom]