It has a geek component - how do you program that?
It's an easter egg - something to be found.
It's cute and unexpected.
And it's a Friday afternoon/evening, and people are looking for a distraction.
This is actually more than 1 year old, and it was already on hacker news..
That is what I am talking about. That thing, right here, you know, where you unsuspectedly delight your visitors. That's what we all ought to aim for - delighting users when they least expect it. (And even more so when they do expect it.)
Damn, I felt giddy. Now everything on my screen feels tilted even though I'm not on Google anymore. Perhaps its time to shutdown and get out.