[Now Zacharie is a calm person by nature and Tim has probably seen him in enough ridiculous, strange and possibly even dangerous situations to know that - although the masked wizard swore up and down he had nothing to do with the specter incident in the boys' bathroom. Still he can't help a wince and the "Oh shit!" thought that is generally followed by a trip to his Head of House's room.

But the door is opened, the room is check and left alone. Zacharie breathes a sigh of relief.]

Ah ah ah, now that is cutting it closer than normal! I am lucky I have nine lives...or eight now. How are you, dear Tim?

[Regardless, he's not stupid because the classroom was empty besides them and there probably was no good reason beyond magic that the teacher wouldn't have at least spotted him. Still, he won't call attention to it if Tim doesn't want to.]