RedactedNarrative: OWNER AND PASSENGER OF V1 WAS NOT OPERATING DUE TO HIS LEVEL OF INTOXICATION.  THE OPERATOR STATED IT WAS DARK AND SHE WAS NOT FAMILIAR WITH OPERATING V1 OR THE LAYOUT OF THE LAKE BUT THE PASSENGER WAS SEATED RIGHT NEXT TO HER GIVING HER INSTRUCTIONS. OPERATOR STATED SHE WAS TRAVELING APPROX. 35MPH AND THE BOW OF V1 WAS "UP IN THE AIR" WHEN SHE STRUCK A ROCK BANK.  V1 THEN TRAVELED ABOUT 15 YARDS ONTO LAND AND LANDED WITH THE BOW POINTED 90 DEGREES TO THE RIGHT.  BOTH OPERATOR AND PASSENGER WERE EJECTED ONTO DRY GROUND.