Right on.
I like how they discourage the "swinging leg" technique... it looks cool because everybody's seen old footage of WWI ground crews doing this. But those guys had a legitimate reason to 1) put part of their body in the prop arc and 2) reduce their stability by at least 50%: they were swinging heavy rotary engines with enormous props that often had heavy steel guards on the leading edge. They needed a little extra energy in addition to what they could do with their upper body.
But when you're hand-starting something like a Cub or Champ, or even a Cherokee, there's no need for this, and it makes me cringe when I see it, even though I know people who've been safely doing it that way for years.
They also talk about working with the impulse coupling and placing the fingers correctly, to minimize kick-back problems. smart.
Only thing I've ever hand-propped is 65-hp Champs, but believe me, I treat even that "toy" engine and prop like it's a Bearcat with a flaky throttle linkage and no brakes. Nothing gets in the prop arc, I have both feet on a firm and safe surface when I swing the prop, and I am moving my entire body away as I follow through. When that first piston fires, you have a metal or wood club suddenly and rapidly coming at you that's about 3 feet long and weighs more than 30 pounds. It can ruin your day, even before it reaches idle rpm, and even if you only get a fingertip smashed by it... so you must not have any part of your body in its path, and you have to be moving away, just in case the airplane lurches towards you. Imagine holding such a prop blade, loose, in your hand, holding your other hand in front of you, and simply bringing the blade down onto that hand, say, with the force you'd use to drive a nail. That would hurt, right? Same goes for your leg, or your head. And without doing the calculations, I'll wager that a Champ prop on its first sputtering lurch will yield a lot more energy. And if your fingers are hooked over the trailing edge and it kicks back- ouch.
Unless it was a matter of life or death, I don't think I'd try to prop anything that normally uses a starter. Just my little rule of thumb. Some pretty wimpy engines have starters on them, but here's a life lesson: rented C-150 with an O-200 wouldn't start on a very cold morning. Tried repeatedly, and killed the battery. All seemed correct with the controls... hmmm. I shut everything off and pulled it through, and I could tell immediately that the starter pinion was stuck in the "engaged" position, causing the engine to conk out due to the load (and I guess it interferes with the timing, like trying to start a car in a high gear). And even if it had turned over before the battery died, it's not good to run an engine with an electric starter engaged with the flywheel. Flight cancelled, as far as I was concerned.
But an instructor disregarded my analysis, and proceeded to try to hand-prop it, while standing on ice... and yes, he swung his leg. I didn't have a cellphone at the time; I remember visualizing a quick path to the nearest phone to call an ambulance when he inevitably slipped just as it started, and got clobbered... and I cringed each time he tried to pull it.
He must have tried valiantly six or seven times before he reluctantly accepted defeat; damn good thing it never even turned over.
Having said all that, I have to also say that as the video suggests, this unfortunate guy at Gillespie might have succeeded despite the odds, but it's safe to say that his technique was probably lacking. I'm guessing he was leaning on the prop as he pulled it down, or he swung his leg and lost his balance. Might have done it before, but you only have to do it wrong once...
