OPERATOR WAS PULLING HIS SON (P1) ON A WAKEBOARD AND THE WAKEBOARDER ATTEMPED A TRICK FLIP WHICH RESULTED IN HIM FALLING OFF AND CAUSING A POSSIBLE CONCUSION.  WITNESSES INDICATED THAT (P1) WAS UNCONSIOUS FOR APPROXIMATELY 90 SECONDS. HE WAS BROUGHT TO THE NORTH MARINA RAMP WHERE HE WAS TRANSPORTED BY AMBULACE TO RAPID CITY. OPERATOR STATED HE WAS TRAVELLING AT EXACTLY 22.5 MPH.  (P1) WAS WEARING A TYPE V STYLE NON- CG APPROVED PFD AT THE TIME OF THE ACCIDENT.
HOT SPRINGS                   