In 22 years and thousands of Hours in the SES training business I have seen lots mistakes around the docks, beaches, etc, flying the plane is the easy part for most, not all. I have had students get in a panic around docks, trip on headset wires, miss the step and fall face first on the float, slip on the wet docks, fall off the floats, jump off the float in arctic clear waters which they thought was 2 feet and was over their head, slip on wet rocks and fall and once where a guy tried going forward of the strut with engine running? He sure got yelled at and he froze instantly! It can get challenging when around trees, beaches with rocks, docks with the wind blowing and trying to secure the floatplane and some SES training facilities never use docks? A very important part of floatplane operation! I know the pilot well and he has been flying floats many years, is a great pilot and a great guy, I feel very bad for him and this accident. Most of the accidents of floatplanes that happen seem to be gear down water landings and I know a few people who have lost their lives with that mistake.