2003 LEXUS IS 300 Power Trainautomatic Transmission Problems

I WAS SITTING IN MY 2003 LEXUS IS 300 4 DOOR IT WAS A RAINY AND UNUSUALLY COOL DAY SO I ROLLED THE WINDOWS DOWN AND WITH THE CAR IDLING I LISTENED TO SOME MUSIC AND CONTEMPLATED WHERE TO EAT DINNER IT BEING AROUND 5.30 PM. SUDDENLY THE THROTTLE OPENED UP AND THE CAR SHOT OFF LIKE A ROCKET OVER THE CURBING THROUGH SOME BUSHES AND INTO A POND MAYBE 15 FEET AWAY THE CAR WAS MOVING SO FAST THAT AS IT WAS SINKING IT MOVED OUT ABOUT 20 FEET. IT WAS COMPLETELY SUBMERGED AND I WAS LUCKY TO UNBUCKLE THE SEAT BELT AND CLIMB OUT THE OPEN WINDOW AND SWIM TO SHORE THE ONLY INJURY A SPRAINED ANKLE. THE CAR WAS A TOTAL LOSS. AMAZINGLY I WAS GIVEN A TICKET FOR WRECKLESS DRIVING THAT WAS DISMISSED AS THERE WERE NO WITNESSES THE POLICE AND THE INSURANCE COMPANY INSISTED THAT...