"Idiot boy!" snarled Snape, clearing the spilt potion away with one wave 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 Finnigan. Then he rounded on Henry and Ron, who had been working next to Neville."You, Potter, why didn't you tell him not to add the quills? Thought he would make you look good if he got it wrong, did you? That's a point you've lost for Gryffindor." This was so unfair that Henry opened his mouth to argue, but Ron was seen kicking him behind their cauldron."Don't push it," he was heard muttering. "I've heard Snape can turn very nasty."