Bad news: The crazy Sukhoi Su-35 stunt was not entirely true. The pilot flew without canopy, but the ejection was on the ground. Dangerous, but not that dangerous. We tracked down the video, which shows how the eject seat works.
I don't know yet if the crazy Sukhoi Su-35 pilot jumped at Mach 2.0 or not, but the scene showing the fighter flying without a canopy—and one of the pilots jumping—was filmed for a movie called Kerosene Cowboys:
Holy frak. Holy frak. HOLYROLLERBLADINGFRAK! Movie producers paid two Sukhoi Su-35 pilots to fly without a canopy at Mach 2.0, and have one of them eject in what
probably is one of the most dangerous stunts ever filmed. (UPDATED)