Sharp'inun twist drills

I used to work with an old guy when I was hired as a machine shop "manager" back when I was about 25. This guy was a retired WWII aircraft machinist, so far as I was concerned, HE was the manager. We always got along great. He could take any drill bit right up to the grinder in his bare hand first time every time and get it perfect. He tried to show me, but I was too stupid. I do remember he didn't keep the bit still, he mover it in an arc on each flat of the tip. Try as I might through the years, I've never been able to do it. I'm just a retard. But I tell you what, that old guy was a legend genius.