Steep seats are becoming more and more common at arenas across America. They're designed so that spectators in the upper decks are closer to the action with unblocked sightlines, but are they dangerous? Paul McCartney opened to a sellout crowd at Sacramento’s new Golden 1 Center last year. A concert-goer was wheeled out of the arena on opening night after he says a fan fell on top of him. “It just felt very unsafe walking up there,” he said. He's not alone.