Here’s an interesting idea created by Decker Yeadon with sustainability in mind. If you can look beyond all the typical pratfalls that would result from cutting leg-sized holes in your floor (they can be easily patched when not in use), you’ll find the OOoo Chair is a forward thinking idea that may just be ahead of it’s time. My only issue: if this is done for conservation of materials, wouldn’t you be essentially building two floors? Or would your legs simply dangle there ominously? via.