Harry, remembering the Boggart, caught Ron's eye and they both grinned; Snape's mouth thinned and he pushed the hat toward Dumbledore, who swapped it for his wizard's hat at once.
Dear Mr. Potter,
Something silver-white, something enormous, erupted from the end of his wand. He knew it had shot directly at the Dementors but didn't pause to watch; his mind still miraculously clear, he looked ahead ¡ª he was nearly there. He stretched out the hand still grasping his wand and just managed to close his fingers over the small, struggling Snitch.