The dragon met Harry’s challenge with a roar of her own and released a stream of white-hot flames at him. Instinct took over as Harry jumped to cover behind a large boulder, blocking the fire from consuming him. He rolled, absorbing the impact of his dive and waited as the heat from the flames washed over him. Somehow Harry thought that this was actually not the worst situation he'd been in. When the dragon finished, Harry chanced a peek over the now-glowing boulder. The Horntail was still bearing down on him but given that it was chained up to stop it from escaping, it couldn’t fully reach him. That was good, he could use that to his advantage.