And this one is only realising that fact. And is proceeding to pound his head onto the imaginary wood wall in his mind in the hopes of beating some sense into it.

"Argh..." A sigh. It couldn't be that much worse than teaching the Shounen Tantei, could it? "Fine. But remember - you're supposed to not get noticed. I'll tell you when I think you're actually getting it."

And proceeds to walk off in a random direction.