[He has to actively keep himself in check from using names here. Stick to codenames. That's why Kaiba, or in this case Ryu, bites back a response. At first. But it's the declaration to 'think positively' that makes him snap. (Ducking a little shattered mirror glass doesn't help, either.)]
Stop that before you hit one of us! Do you even know what you're doing?!
ii
Stop that before you hit one of us! Do you even know what you're doing?!