[This is clearly Kakashi's fault. Seriously, Sasuke was just minding his own business, not having the damn things fall off at all. And then as soon as he starts talking to Kakashi, they come off.
He didn't think anything unusual. He did not. Under no circumstances was there anything even vaguely suspect about his thoughts. He was not thinking anything out of the ordinary. So either the fucking ears are broken, or Kakashi did it.]