I flew helicopters for the US Army for over 20 years. It never ceases to amaze me to see helicopters, especially single engine, hovering around at twenty or thirty feet above the ground. When I first learned how to fly, it was in the OH-13 E & G models, admittedly there were some engine reliability problems, but we were taught to hover 2 to 5 feet above the ground. There were reasons for this, 1) develop and maintain precision hovering skills, 2) when the engine craps out, not if, a successful hovering autorotation is far easier from three feet +/- than twenty, and 3) the rotor wash is much less at the lower altitudes (safety for others in the near vicinity). Had that Huey hovered across the runway at three feet, the Cessna 210 “may” have been able to successfully complete his go around. Just another point of view.