Nothing...it's just really sort of...well, I can't describe it.
[He shrugs at the argument, giving his tie a quick tug.] I'm not the one crying because someone tugged lightly on their tie. We're the same, but I might just be a little more mature than you, Doctor.
[He can't help but smile a bit when the other jumps, releasing his tie so he doesn't end up choking himself in the process.] Well I didn't kill anything. Besides, you have to admit you were a bit curious about it, weren't you? [He shrugs, letting the other poke him.] You sound disappointed. And what's with the brainy specs? You know that I know they don't do much more than make you feel smart.