A bunch of men launched a whopping half million balls down the stairs of Holy Trinit on Pincio Hill in Rome. See the video below:
The scenario is very similar to a TV manufacturer commercial, that became a viral video on the Net a couple of years ago: see by yourself.
Before you ask, the soundtrack is "Heartbeats" by Jose Gonzales.
The commercial involved 250,000 bouncy balls, so the half million declared by the newspaper seems a bit overrated. Is quite an effect anyway.