This is a very interesting interactive urban furniture with some pattern behaviors. "Each bin or bench has its own personality and impulses - if it's raining a bench may decide to park up under a tree waiting for someone to sit on it; whilst on a Wednesday the bins will line up waiting to be emptied. Occasionally, they will all burst into song with the bins forming a baritone barbershop quintet and the benches a high soprano choir" (by Greyworld).
