V1 WAS FOLLOWING A BEND IN THE RIVER AND STRUCK THE OPPOSING BANK. THIS CAUSED THE VESSEL TO ROLL AND CAPSIzE ONTO THE PORT SIDE. OPERATOR WAS EJECTED FROM THE VESSEL AND POSITIONED UDER THE VESSEL. THE THREE PASSENGER FELL FROM THEIR SEATS BUT HELD ON TO PART OF THE SEATS MOMENTARILY BEFORE FALLING ONTO THE GROUND. MINOR INJURIES WERE SUSTAIED TO THE OPERATOR.; operator:LARGE LACERATION TO LEFT SIDE OF HEAD. MINOR BRUISES AND CUTS ON ARMS LEGS AND FEET; occupant1:BRUISED RIBS AND CHEST