Having come into flying from car racing and being a speed freak there is nothing like such low flying of course I have never done anything like that
over water or deserted forests.
I would add I am sure we have all flown down the runway at 20 feet I am sure IFR we have hand flown to minute tolerances?
The aircraft doesnt know its at 20 feet not 2000 feet and at least over water you wont hurt anyone but yourself.
Having said that if the donkey goes bang your in the drink! You will probably be out of ATC reception and dont even contemplate such acts unless your skills are well up to it?
Over rough seas you may get a bigger wave than the rest
Look at the Red bull racers do we admire them or think they are a bunch of lunatic cowboys? (Yes probably
But surely most of us have a dream of flying over deserted terrain just above tree and lake tops stearing around rock faces with our wing tips cutting a shadow a few feet up in a Piper Cub and at one with nature ? NO where is your spirit of adventure?
Saw that famous clip of a Russian Pilot flying inverted under a hump back bridge and YES I admit having a sly admiration for those guys.
But DONT DO IT
well at least not inverted
YouTube - Inverted Flight Under Bridge
Pace