What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot had just dropped off one passenger and some light cargo onto a pier built in the preserve from which wildife is observed. Pilot was water taxing towards his 4 o'clock position at flight idle power and "some collective, to lighten the weight on the floats". When he was about 15 feet from the pier, he attempted to bring the helicopter into a hover. He felt the helicopter begin to roll to his right. He input full left cyclic and lowered collective, but the helicopter continued to roll right. Upon hearing the main rotor make water contact, he reduced power, and the craft came to rest inverted, in about a 110 degree roll attitude to the right from level. Pilot egressed the helicopter through the pilot's (right side) door, which had popped open. He reached back into the cockpit and secured fuel and the master switch.
As the FAA filed it
(-23) PILOT HAD JUST DROPPED OFF ONE PASSENGER AND SOME LIGHT CARGO ONTO A PIER BUILT IN THE PRESERVE FROM WHICH WILDIFE IS OBSERVED. PILOT WAS WATER TAXING TOWARDS HIS 4 O'CLOCK POSITION AT FLIGHT IDLE POWER AND "SOME COLLECTIVE, TO LIGHTEN THE WEIGHT ON THE FLOATS". WHEN HE WAS ABOUT 15 FEET FROM THE PIER, HE ATTEMPTED TO BRING THE HELICOPTER INTO A HOVER. HE FELT THE HELICOPTER BEGIN TO ROLL TO HIS RIGHT. HE INPUT FULL LEFT CYCLIC AND LOWERED COLLECTIVE, BUT THE HELICOPTER CONTINUED TO ROLL RIGHT. UPON HEARING THE MAIN ROTOR MAKE WATER CONTACT, HE REDUCED POWER, AND THE CRAFT CAME TO REST INVERTED, IN ABOUT A 110 DEGREE ROLL ATTITUDE TO THE RIGHT FROM LEVEL. PILOT EGRESSED THE HELICOPTER THROUGH THE PILOT'S (RIGHT SIDE) DOOR, WHICH HAD POPPED OPEN. HE REACHED BACK INTO THE COCKPIT AND SECURED FUEL AND THE MASTER SWITCH.