That would only "hurt" the people standing below...
edit: BTW, during the Slipknot gig at Rockefeller, Oslo in 2005, people jumped down onto the floor crowd from the balconies

That was the most intense concert I've ever been to. 1500 people (packed), the boys playing for two hours straight and giving 100% all the way, and with a constant whirlpool of mayhem in the crowds. Prodge at Sentrum Scene, Oslo (similar place, a bit smaller) in 2009 coming in on a cool 2nd. I've seen both Slipknot and Prodigy at Oslo Spektrum (indoors stadium, and with no age limit)... Meh...