Folding staircase - GIF

Folding staircase.

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Previously:

Brick spiral staircase - GIF
Building a floating staircase - GIF
Concrete staircase cutting saw - GIF
Lowering a concrete staircase into place - GIF
Marble staircase following vein - photo
Sandblasting a staircase to remove old finish - GIF

Great for saving some space - any other reason to make it

2 reasons come to mind. Possibly there was a need to get something through that door which the stairs interfered with? The other reason...... because he could! LOL. I think it is creative but a hell of a lot of work. If there are 13 treads, he has to install 416 screws in all those hinges. Any misalignment will cause binding in that hinge.