[BlackArcher101]

Wow, amazing pictures.

It looks like to me a loss of control. Judging by the tail stabilizers, they locked into a position giving a right roll. Leading up to the roll, you can see the pilot moving the stabilizers and maintaining the AoA and bank, but just before the roll starts there doesn't appear to be any inputs or they have no effect. You can hear the engines spooling up just as the tip started, but he probably realized it was too late and ejected. I didn't see any apparent engine failure signs, such as a stall, flameout, or iconsistency in exhaust plume.

My bet... computer failure. Without a computer to aid in stability, they don't fly.

edit: On review of the photos even further, it appears the right engine nozzle is closed more than the left. I can't recall what the positions are and how they are controlled however.