Actually, I had a student once flash her chest at me. Not really flash, but she leaned forward and gave me a good view of what was going on down the front of her shirt (admittedly not much was going on) before sitting back with a big grin on her face. I remained calm, and said, “You still have to do the conversation exercise. Go!”
Still, it beats fighting your hakwon director to get your passport back, wouldn’t you say?