Harry Potter and the Philosopher's Stone2001

[After their fiasco with a three-headed dog.]

Ron:
What do they think they're doing? Keeping a thing like that locked up in a school?

Hermione:
You don't use your eyes, do you? Didn't you see what it was standing on?

Ron:
I wasn't looking at its feet! I was a bit preoccupied with its heads. Or maybe you didn't notice. They were three!

Hermione:
It was standing on a trapdoor. Which means, it wasn't there by accident. It's guarding something.

Harry:
Guarding something?

Hermione:
That's right. Now, if you two don't mind, I'm going to bed before either of you come up with another clever idea to get us killed. Or worse, expelled. [Goes into her dormitory]

Ron:
She needs to sort out her priorities.