Watch Your Step on Disappearing "Wall Stairs"
Unless you're on par with the likes of James Bond, or frequently find yourself escaping from super-villains, it's unlikely that you have any real need for a staircase that disappears at the touch of a button. But just in case, allow me to introduce "Wall Stairs," designed by Aaron Tang. He likes to think of his stairs as a redefined door: A structural element that allows passage to another environment when open, and prohibits passage when closed. And in this case, that restriction is quite literal.
These stairs are so nifty that even with room to spare, my guess is you'd want this space-saving innovation, if only to play with them every day. In the flat position, this staircase is flush with the wall. At the simple push of a button, powerful hydraulic pistons slide the frame out and the planks that make up the actual stairs gently drop down in a graceful, upward-bound wave, creating a solid staircase from which to reach new heights.
Or, your intention might be to run away from a psychopathic maniac and find safety on the second floor. You could also create a really exclusive VIP room at a party and generate a tangible sense of separatism from your not-so-cool guests (that is, until they get a ladder and come beat you). Whatever your aim, you can (maybe) get to higher ground with these stairs. But I would suggest exercising caution while inebriated: Don't forget to push that button, or you're in for a nasty fall!
Found via treehugger