I agree with the outcome (that Bane deserved an ejection) but I disagree with the reasoning. It should have been a flagrant two for committing a hard foul on a defenseless, airborne player. Bane then batted the ball down and happened to hit Okongwu laying on the ground. It would probably warrant a technical foul under normal circumstances, but is a minor detail in comparison to the fact that Okongwu was lucky to have landed in a way that did not result in a serious injury.