Gary, I meant it as a compliment.
I figured you'd have the flexibility and leg strength to make it work.
After getting bad arthritis in my left knee I can't do stuff like that any more.
Since we do most of our falling in winter, kneeling is not done, not only for safety but for the simple reason that you get your pants wet.
I powersquat and place my elbows on my thighs, letting my legs take the weight of the saw.
That means I can isolate the back and keep it straight.
As for looking up, never thought of that as a problem.
Having smashed two hardhats over the years, I'm extremely paranoid about what comes down, so I look up a lot.