Hands off Professor McGonagall

Actually it's because she turns into a cat just before death comes. And cats have 9 lives

She's one sneaky fucker. But she's on her last life as a cat.

Excuse me? It's over? The bell has rung? You still have homework. I will see you next lesson.

I will not have you collect my soul and leave the fans cry like a babbling bumbling band of baboons!