RedactedNarrative: OPERATOR STATED THAT AT APPROXIMATELY 2045 HOURS HE WAS TOWING TUBER1 AND TUBER2 ON TUBES BEHIND HIS 2015 YAMAHA SX240 (INDIANA REGISTRATION INxxxxxx).  OPERATOR CLAIMED THAT WHILE EXECUTING A TURN IN THE MAIN BODY OF THE RESERVOIR THE TWO TUBES JUMPED THE WAKE AND COLLIDED.  TUBER1 AND TUBER2 HAD NO VISIBLE INJURIES BUT AFTER TUBER1 AND TUBER2 RE-BOARDED THE BOAT. OPERATOR AND HIS PASSENGERS BECAME INCREASINGLY CONCERNED ABOUT TUBER1’S CONDITION.  OPERATOR STATED THAT HE HAD NOTICED CHANGES IN TUBER1’S ATTITUDE AND BEHAVIOR AND 911 WAS CALLED WHEN TUBER1 HAD DIFFICULTY EXITING THE BOAT ONCE BACK AT THE DOCK.  OPERATOR’S WATERCRAFT, REGISTRATION, AND PFD'S WERE INSPECTED AND NO VIOLATIONS WERE FOUND.  TUBER1 WAS TRANSPORTED TO IU SAXONY HOSPITAL WHERE SHE RECEIVED TREATMENT FOR INTERNAL INJURIES.