They reached the dark landing.
¡°But you passed your exam with three hundred and twenty percent!¡± said Ron.
¡°Everyone gather ¡®round,¡± said Snape, his black eyes glittering, ¡°and watch what happens to Longbottom's toad. If he has managed to produce a Shrinking Solution, it will shrink to a tadpole. If, as I don't doubt, he has done it wrong, his toad is likely to be poisoned.¡±