Fearfully fascinating subject.

With feeling.

Gryffindors, keep up, please, and stay alert.

- My scar. It keeps burning. - It's happened before.

Keep your broom steady, hover for a moment...

Gryffindors, follow me please. Keep up. Thank you.

Follow me, everyone. Keep up. Quickly, come on.

Does anybody feel like we shouldn't be here?

Feels strange to be going home, doesn't it?

You've got to keep eye contact, and Snape wasn't blinking.

...possession of abilities so formidable that you feel confident enough...

Oh, and keep an eye on the staircases. They like to change.

Keep up, please, and follow me. Quickly now, come on. Come on.

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

Drinking the blood of a unicorn will keep you alive even if you are an inch from death.

Everyone's to keep their feet firmly on the ground while I take Mr Longbottom to the hospital wing.