question sleep; i think i know where it came from: i've read that Jhonen Vasquez himself is an insomniac, explaining why most of what he's made was written in like 1-4:00 in the morning. (it says so in the text in the JtHM books and in some of the comics) In fact, Nny never sleeps and neither do the Irken aliens.
Nice picture, btw. I like how he seems to be wondering what sleep is, and just falls asleep afterwards.
I think the question sleep thing has something to do with the part in the comic where Nny is talking about the idea that the world you wake up in could be different from the world you fall asleep in. Because of that, Nny tries not to fall asleep, because he questions sleep.