V1 occupied by 6 passengers was pulling a tube with occupants 8 & 9 on the tube; traveling west at approx. 40mph.  V1 entered a shallow water area (sunken island) causing grounding at prop and underside rear hull of V1.  V1 stopped abruptly causing passenger 1 and passenger/victim 2 to be ejected into the water.  Occupant/victim 8 injured his right foot (unknown direct cause).  911 was called and passersby stopped to give aid.
HOT SPRINGS                   