Allthough I didn't have a lot of them this semester they weren't any less annoying. For some of us (including me) staying up all night before and exam became kind of a tradition. One might imagine we would get older and wiser and dump this habit ... but .... nope. We still procrastinated until learning became absolutely inescapable and then used what was left of the night to prepare for the oncoming exams.
How do people look after pulling an all-nighter? This is how ;)
and this is how my colleague Roland (aka. Roll) looks after the exam:

Looks pretty down, but trust me he looked worse... ;)