[He might not be obviously scared, maybe Murdoc is projecting his own little anxieties onto the situation. The way Bro is looking at him makes him feel like a horrible monster and he hasn't even had a chance to see himself in the mirror yet! He has no idea how bad it is, but seeing Bro stare at him like that is a pretty good indication.]

You're the one bein' nonsensical! Not to mention unhelpful! You aren't the only one sufferin' right now, would it kill you to stop bein' such a bastard and make things easier?

[He gives him a funny look, starting to fume himself out of frustration.] You're in a damn magic school, Dirk. Look around you! [His room isn't muggle-like by any standards, and he's going to ignore the insults in order to shuffle through his bedside table drawer until he finds what he wants.] And if you want more proof, you can have this. [He takes a wary step forward, holding out a moving photo of them hugging and generally enjoying each other's company.]