Follow The Bouncing Ball. Cause & Effect Tennis Ball Installation by Ana Soler.
This art installation, Causa-Efecto, at The Mustang Gallery in Alicante, Spain by artist Ana Soler suspends 2000 tennis balls in action. It's been all over the internet, so you may have already seen it at Fubiz or Psfk, but in case you haven't, here's a good look at the installation.
all images courtesy of the artist