The Whomping Willow was creaking and lashing out with its lower branches; they could see themselves darting here and there, trying to reach the trunk. And then the tree froze.
¡°Even the Hogwarts ghosts avoid it,¡± said Ron as they leaned on the fence, looking up at it. ¡°I asked Nearly Headless Nick¡he says he's heard a very rough crowd lives here. No one can get in. Fred and George tried, obviously, but all the entrances are sealed shut¡¡±
¡°Get the door!¡± Aunt Petunia hissed at Harry.