Muhammad Ali Sculpture makes up of 1,300 speed bags

"using 1,300 punching bags, 6.5 miles of stainless steel cable, and 2,500 pounds of aluminum pipe to construct a 22-foot-high installation that took three years to complete" By artist Michael Kalish.
"The idea for the project came to Kalish as he was falling asleep one night in 2008: an array of custom-made, teardrop-shaped speed bags suspended in midair that, from just one vantage point, align themselves like pixels into an image of Ali's face."