This "running of the balls" is a substitute for the running of the bulls. This guy got knocked into a coma anyway. As an animal-friendly alternative, authorities in the town of Mataelpino, near Madrid, replaced the bull with a 660 lb resin ball, decorated with the face of an angry bull.
Unfortunately, rolling such a huge resin ball down a hill towards people isn’t a particularly safe activity either. Two people ended up seriously injured after being crushed against the course’s fencing by the massive ball. One man had to be put into an induced coma, and another person suffered from three broken ribs.