"Idiot boy!" snarled Snape, clearing the spilled potion away with one have of his wand. "I suppose you added the porcupine quills before taking the cauldron off the fire?"Neville whimpered as boils started to pop up all over his nose.
"Take him up to the hospital wing," Snape spat at Seamus. Then he rounded on Harry and Ron, who had been working next to Neville.
"You -- Potter -- why didn't you tell him not to add the quills? Thought he'd make you look good if he got it wrong, did you? That's another point you've lost for Gryffindor."
This was so unfair that Harry opened his mouth to argue, but Ron kicked him behind their cauldron.
"Don't push it," he muttered, "I've heard Snape can turn very nasty."
