[ He closed his eyes. ]

... I see. So that is why.

[ At this point he supposed saying 'don't use it' is useless and the kid's time seems to already be unfortunate limited (as he already knew), so it goes without saying. He does sigh, though. ]

That said, perhaps we should head back within. The demonstration is enough, I believe. Although, we may continue to speak more about techniques if you would like.