Give him answers? What does he want the Hulk to say? He's angry, and this puny person shouting at him is doing absolutely nothing to make him feel any better about anything. He needs to be left alone to vent all of this rage, but if he can't do that? He yanks up a bench near the fountain and swings it at the Doctor with a shout. If he's smart, he'll get the picture. Leave Hulk alone, or get smashed.