So Cory is the last man standing? Makes sense.

Awe...everyone but Cory’s asleep...no more chaos...darn it. No offense to Cory but he’s been quite sensible while sleep deprived meaning less inclined towards chaos...Ah well, all good things must come to an end.

Corry: Wait, do i have to clean up everything by myself? Screw this, i'm sleeping too. We'll clean tomorow.

The reality is that, in lore, Cory NEVER sleeps properly, and is always irrational. So, as a matter of course, he DOES sleep properly during exams, causing him to be rational. Now you know.

Is this perhaps alluding to future Zoro moments? Having Cory be the only one awake just reminds me of how Thriller Bark ended XD