All it proves is that your bird is well balanced. Nothing more. The Cobra Manuever is worthless in combat. Right after you do it, you are left helpless. You have lost everything. At that point, a SE-5 can take you out. This is another reason the SU-35 isn't the terror it's suppose to be. If it uses it's vector thrust to out do, say, a F-15 then it's going to left hanging in the air and the F-15s wingman will easily take it out. After learning this, the F-15EX and CX became viable again and will be in the 2020 Military Budget.