If you thought the Crazy Ivan maneuver was just something that only the old Soviet Subs did check out this video link. Truly impressive super manoeuvrable airshow - recommend watching in full screen.
My guess a Sukhoi Su-37 Super Flanker or earlier variant. The maneuvers demonstrated are called "Kulbit", "Bell" and "Cobra". I would have to say whoever tried them first had to be a little crazy and may have been named Ivan.
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