Here are the possibilities:

a) I got a sudden burst of motivation and decided to finish grading and transcribe some interviews
b) I’ve been IMing with Iron Buttercup since, like, midnight
c) Someone has to taste-test the sangria for tomorrow (verdict: it’s not very good. I kind of fucked up the sangria. How do you fuck up sangria? More importantly: how do you fix sangria?)
d) I decided to be all, la di da, I’m not really driving three hours to lovely Nearby State tomorrow to camp
e) I’m a dumbass who just will not go to sleep before 3 am, whether I’m working or just fucking around
f) all of the above, except A, of course, which is just absurd.