By the time Steve came to a halt in front of Hulk, Tony's voice (and whatever that thing was that was flying around Hulk's head) was doing a good job of keeping Hulk from smashing the people around him. It was a move in the right direction, a stall tactic, maybe, but a move in the right direction. He made sure the girl with the arrows was out of harm's way, and then he moved on ahead and jumped up onto the first row of balconies at the Stratosphere, wanting to get some height on the green creature.
Five balconies up, and still a few feet away from where Tony had arrested Hulk's attention, and Steve cupped his hands to make his voice carry as far as it could. "Hulk. Listen to Stark. NO SMASHING," he insisted, not sure how they went from screaming to getting Dr. Banner back. He really needed to ask that for future encounters like this.