A teacher puts a student in the hospital with an attack from the back, and Dumbles says "Don't do it again"? This one is as bad or worse than the original. I suppose killing someone would get the teacher suspended without pay (pending a hearing, of course).
Author's response
- You're right, the "Don't do it again" was out of character.
- given the damage routinely done to the students in classes like Potions... the DADA instructor was pretty unimaginative I admit.