Chairless chair
It’s like a chair that isn’t there, but magically appears whenever you need it. It’s called the Chairless Chair and you wear it on your legs like an exoskeleton: when it’s not activated, you can walk normally or even run. And then, at the touch of a button, it locks into place and you can sit down on it. Like a chair that is now there.
http://edition.cnn.com/2014/
here is the video link (3.5MB)
