Without conclusive diagnostic evidence…..yes it is speculative. He also had what looked like a serious hyper extension of his lower back earlier in that game that clearly effected him that could have played a significant role in his instability. I’ve had lumbar spinal surgery and know the type of side effects that can occur, to include severe pain and instability of lower extremities. That too is speculation, but that’s the point.
Two separate specialists cleared him of head trauma, the staff diagnosed it as a back issue, and Tua himself explained it as a back issue. I’m all for investigating the chain of events and searching for answers to come to a better conclusion (it’s not just understandable but absolutely necessary)………but until that’s done it’s all reactionary, emotion driven response and speculation.