When you pull an all-nighter you get to see a lot of things. You see the janitors. You see how the cleaning goes down. You see other night owls. You see two undergrads dropping off homeworks at 2:30 am. You see the first rays of dawn. You see those who come in early.
It's fun to pull an all-nighter.

Dear Pizza Joint Folks,
The brown napkins that you guys hand out with your logo printed on them, yes, I'm talking about those. They are quite sturdy and I occasionally use them to blow my dear nose. Upon bringing the napkins closer to my dear nose a funky odor is smelt which is rather undesirable. Please remedy this defect as soon as possible.
Cheers,
Captain H.