A few weeks ago I posted a video of an amazing folding chair that expands to approximately 30 times its original size. It turns out that this chair, called the FlexibleLove 16, is part of a real product line available for purchase online (although it's currently sold-out).
The FlexibleLove seat expands to hold as many as 16 individuals, weighing up to a rather hefty 4224 pounds. http://www.flexiblelove.com/eng/?page_id=15 via Better Living through Design (note, the product can be purchased here).