This woodworker believes the solution to the kickback that happened

[Jacob Mac]

Don't push off cuts into the side of a spinning blade. I can't see a riving knife preventing that kickback. He did something that was pretty foolish.

[johnny means]

A riving knife would have definetely helped. You clearly hear the teeth start to cut into the piece. He also talks about the arc of shame cut into the piece by riding atop the blade.