Anyone can think of various practical applications for this interesting concept. Have acquaintances over the crib and don’t want them meddling? Well here you go. Going out of town for a while? Keep your valuables protected on the top level, then shut down the stairs, etc. Created by industrial designer Aaron Tang, his wall-mounted stair concept applies a series of hinges and pistons to retract planate to the wall. The staircase’s seemingly choreographed step-by-step motion (seen above, and the animation can also be viewed via blackberry) of unfurling doesn’t hurt the product’s appeal either…

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