I was Googling some Python topic when my search results page suddenly split in the middle with some text saying something to the effect of "You speak our language, would you like to take a test?", linking to http://www.google.com/foobar/ .I followed it and was led to a pseudo-shell, where I then found some coding problems. I can return to the page to continue working on them.
I've searched around and haven't found anyone else talking about this. What is it?