RedactedNarrative: Two people launched the PWC on Narrow river, Operator was operating the PWC and passenger was on the back. As the left the ramp passenger shifted her weight unexpectedly as he gave the PWC power and turned, this  caused the PWC to overturn.  Both were thrown into the water and the PWC capsized.  When passenger was pulled from the water she was unconscious she later said she may have hit her head on the PWC as she came to the surface.  Both were taken the the hospital for evaluation and later released.  The engine compartment of the PWC was flooded likely causing extensive damage to the engine.