The Google AdSense website is temporarily unavailable

If you visit the Google AdSense page at the moment, you will see this message in all Google AdSense supported languages: The Google AdSense website is temporarily unavailable. Please try back later.
We apologize for any inconvenience.

Here is the screenshot as demonstration:















What's going on? It seems like a normal error, but is it really interesting to see that the big Google is down :)