Their only warning is a slight clatter, and then there’s a wand aimed at them and a mean set of eyes behind. Hermione shoots a stunning spell, and she thinks — she thinks she's done it, for just a half second, she thinks that everyone's alright, and so does Draco, by the look on his face. But, she should never think everything’s alright, especially not because of her doing, not when Blaise gasps, holds his side and shudders. Draco there with him in an instant.