Hufflepuff: Hey, Ravenclaw! How're you feeling today?

Ravenclaw: Okay, I guess. I prevented homicide from happening today. 

Hufflepuff: Really? How??

Ravenclaw: Self-control. 

Hufflepuff:

Slytherin: If the target is Gryffindor, you don't need self-control. 

Ravenclaw: True. 

Gryffindor: