BJJ Grappler Knocks Himself Out During Failed Throw

A grappler sets up for a throw in competition. He commits to the move, lifting his opponent. But something goes wrong. The rotation isn't there. His opponent counters mid-air, shifting weight at exactly the right moment.

Now the thrower's falling. Fast. He can't adjust in time, can't tuck his chin or turn his head. His face drives straight into the mat. Full force. The impact is instant and brutal.
He's out cold before anyone can react. The opponent lands safely while the thrower lies motionless. Refs rush in. The technique that should've scored points just knocked him unconscious instead.

Can you recover when a throw goes sideways? What happens when you commit too hard?