[ Severus begins to walk to the lifts, and motions for her to do the same-- or at least keep away from the kitchen doors. No sense in her going back in there as soon as he leaves. ]

Merlin only knows how it got in there to begin with. It shouldn't be that bad if whomever started it cleans it up promptly.

[ And if not, yet well, more compensating for Gryffindor stupidity will be done, probably. If it is Black. If it turns out to be Draco's doing, Severus is going to be decidedly annoyed. He thumbs through the network and-- oh.

Nope. Definitely Black. ]