I can't give a Professor love!
And it's Gryfindor in possession again, as Johnson takes the Quaffle— Flint alongside her —poke him in the eye, Angelina —it was a joke, professor, it was a joke...
Professor Snape was forcing them to research antidotes. They took this one seriously, as he had hinted that he might be poisoning one of them before Christmas to see if their antidote worked.
Professor McGonagall: "Why don't you confer with Mr. Finnigan? As I recall, he has a particular proclivity for pyrotechnics.