Pinkie Pie is the name of the renowned Chrome hacker who won Google's Pwnium competitionin 2012.
He unleashed a seven-step exploit chain against Google's Chrome browser, giving him silent remote code execution, also known as a drive-by-install.
Well, Pinkie Pie was back at this year's Pwnium, taking a tilt at some of the Pi million dollars Google had put into the prize bucket.