Tammy opened her mouth to say something about the fact THEY WERE UNRAVELLING TOILET ROLL! Could Hogwarts NOT get any decent Astronomy teachers? EH? NOOOOO. It was her final year, and she was STUCK

UNRAVELLING FLAMIN' LOO ROLLL. HOW? WHY?
DID SHE EVEN DESERVE IT?
NOOOOOO.

In the end, she did giggle at the fact there was whit toilet roll flying around the room, and people were laughing about it. It seemed to have been fun then. Slowly, only slowly not too seem too eager, Tammy picked at the end of the roll so it came unstuck from the rest of it, they had some sort of glue on them maybe.

AND then went on to proceed unravelling it, making it into a little pile on her desk.

AHAHAHAHAA.