Junsu : Yah, what are you doing?! Why did you turn off the lights?!
Yuchun : If we don't turn off the lights, the fans will crowd downstairs.
(An hour later, Yuchun turned all the lights on again)
Junsu : Why did you turn on the lights again?
Yuchun : What if all the fans really leave...?!
(source : proudofyourlove.tumblr.com)