[EricH]

Originally Posted by Wetzel

He is also using the power to tighten the chuck which is not the best of ideas...

If this weren't a cordless drill, I'd agree. However, the modern cordless drills can be hand tightened, but no farther, due to inexplicably not having keyed chucks. Hand tight usually isn't good enough when drilling. Modern hand drill chucks are meant to be tightened with a little power, carefully applied.

Of course, they're also meant to be tightened on the shank, not the flutes. Doing it this way dramatically increases the danger.