Door Reinvented!

Austrian artist Klemens Torggler, reinvents the mechanism of a chair using a folding and pivoting system to collapse and roll inside, how cool is that?
Torggler‘s Evolution Door folds into four triangular sections that collapse in on themselves and turn round before straightening back up into a rectangle.
 
Evolution Door by Klemens TorgglerEvolution Door reinvented with folding mechanism by Klemens TorgglerEvolution Door reinvented with folding mechanism by Klemens TorgglerEvolution Door reinvented with folding mechanism by Klemens TorgglerEvolution Door reinvented with folding mechanism by Klemens TorgglerEvolution Door reinvented with folding mechanism by Klemens Torggler
Images Source: Dezeen.com