Blast by Israeli designer Guy Mishaly are stools created by explosion.
The objects start out as geometric shapes made of metal sheets that are webbed with explosive material. The explosion changes the generic shape into an object identified as having a unique character, and the effects of the explosion will always yield different objects.
Each Blast stool is made by detonating a charge inside a steel blank, ripping legs out of the sides so that every one is unique, and as no material gets lost in the explosion each stool has the same weight before and after detonation. Watch the making of the Blast stools:
BLAST chairs by explosion from Guy Mishaly on Vimeo.
Via dezeen.com