This comic, which I am totally late to the party, I know, is making me think about humor and how it works more so than any comedy has in a while.
Something about the way he draws on archetypes so ingrained we don't even think about them and then turning them on their head. They often tend to be jokes that aren't particularly funny per se on their own, but when cloaked in over the top satire they sort of take on a new life. In this case, upon reflection I think it's the parchment styling of the speech bubbles that ultimately made me laugh and remember the strip.
That and the art style of course. There's something about the way this guy draws faces that elevates jokes that are Family-Guy level to something gripping and hilarious and worth calling art.
I like the immersion achieved by making it resembles something like Blondie. The joke is lame until you see that isn't the joke so much as the train going into the tunnel.
Funny enough without the reference to http://en.wikipedia.org/wiki/Yellow_River
I'm seriously in love with this stuff. This guy makes the unfunny funny, and I don't know if there's been anything else that has done that for me.