I've seen the Knights regularly over the years - at Zhukovsky and Gelendzhik - and I don't recall seeing a Cobra.
That was the domain of Anatoly Kvochure in the Red/White/Blue Su-27P/Su-30 of the 'Test Pilots' team.
The Knights singleton certainly does a tailslide - sometimes accompanied by descending into the flares.
The four-ship - and sometimes a pair of them - finish the routine with a spiralling climbout popping off flares.

or....


.... but no Cobra I'm afraid ...... I'd love to be proved wrong though.....
Ken


