So given a runway of finite length, I have to nail the height over the threshold to achieve this, get the speed right and just nold my nerve until I can get it to run out of height as it runs out of flight.
That, I'm told, is how you land a floatplane when you can't see the surface of the water, get the speed and rate of descent right and just keep flying until you hit the water. (I haven't come across glassy water myself in my limited playing with floatplanes.)