Neville Longbottom: You’re sneaking out again, aren’t you?

Harry Potter: Now, Neville, listen. We were…

Neville Longbottom: No, I won’t let you! You’ll get Gryffindor into trouble again. I’ll fight you. (raises his fists)

Hermione Granger: Neville, I’m really really sorry about this. Petrificus Totalus.

Ron Weasley: You’re a little scary sometimes, you know that? Brilliant, but scary.

From Harry Potter and the Sorcerer’s Stone (2001)