Longbottom:

You're on notice. I saw your little act at the train station, and so did Blaise, Teddy, and Bode.

You offend him and you offend me, got that? You've done a bang-up job hiding your true colours until now, but I saw them come out today when you thought no one but your mates were around. I bet you all had a good laugh together later, didn't you? Laughing not just at a Professor, but at a Hero of the Protectorate, no less. Milli was right, you really are a blood traitor.

Better do a better job of watching your step, if you know what I mean.