Read about the evoution of the technology here:
Sukhoi Su-35 - Wikipedia
It's not a small plane! It weighs 30 tons. And the pilot can make it look like a kitten playing in the sky.
“I mean, come on,” Stephen Trimble, aviation reporter and editor for Flightglobal’s Americas bureau, tweeted Thursday after seeing footage of the aircraft’s demonstration. “And people actually thought the F-35A display at Paris last month was impressive. This isn’t impressive. It’s unbelievable.”
You can see from the vids that at times it looks as though it is about to get completely out of control, then the pilot brings her back just in the nick of time - it's superb flying and an absolute joy to behold.
Clever computerized fly-by-wire, powerful engines, and thrust vectoring. .The skill of the pilot probably has a lot to do with it, too.
The plane is designed to be unstable in the air... and the computer systems keep it all under control.
Without a computer interface, no pilot could ever fly the thing, even in level flight. But that means it's really easy for it to be flipped into instability within seconds — which is the secret of its supermaneuverabilty perhaps?.