Maybe it's because I've been in a sort of sleep adjustment phase the past couple of weeks, I dunno, but I've really been noticing how easily Koreans can sleep practically anywhere. I wish I had been sleeping that well.
I see them asleep on the subway, I think they just magically wake up at their stop. Shopkeepers in the underground shopping malls (and elsewhere) asleep on cots behind their counters or even on the customer seating. My Korean co-teachers have caught naps between classes sitting at their desks. Then again, I've been found asleep in a room full of screaming youngsters at home on occasion. Maybe I'm part Korean?