I can tell you that if I tried to decorate our basement in Sharpie, it would look nothing like this. Then again, I'm not so artistically inclined. The link has video of the entire room, which better shows just how extensive the drawings are. There are lots of little touches, such as a trash can that has been doodled on to look like R2D2 and various literary figures sprinkled throughout the room.
Link
I thought it was vaguely familiar - with over 18,000 posts on Neatorama, even I don't remember what's been on! Maybe we need a Neatohistorian ...
damn....