Operator was attempting to make a sharp 90 degree turn when the tiller and outboard turned hard over.  The vessel sucked in air and lost forward way.  He attempted to correct the course at the same time the engine sucked in air and lost forward way.  The victim was thrown overboard and the operator went partially overboard.  He had a safety lanyard attached to his shorts but did not disconnect because he did not fall completely from vessel.  
Orleans                       