All nighters? Eating food out of the vending machine from the library? Have a strange musky odor that you can't quite get rid of? It's probable you've been taking exams, either that or you've taken up residence in a library to avoid the cold winter streets as any hobo with wits about himself would do.
I am officially done and therefore done with exams as an undergrad. I lucked out with two classes not having a final (one was an English course where a portfolio was due, the other was a marketing elective where we had a test the prior week.) My other three though were not quite as painful as I expected but I did study a ton for them. It's really strange, its been at least four or so semesters since I had an exam where I felt any sense of panic while taking it; I kind feel like I've been missing out on that experience where you feel helpless while taking it, send a prayer up to the big guy upstairs and somehow miraculously pull through with success.