And that's why clip-ons were invented!
We had a guy in one shop that was going to drill a large brass fitting with a ?6" stub, twist drill.
We told him you have to 'dub' the drill for brass or the drill will screw itself into the chuck.
He was a big guy and said. "I can hold it!"
Almost his famous last words!
As the drill split up the middle, I watched the shrapnel just miss his head and he literally froze on the controls!
We had to pry his hands off the hand wheel!
I think he went to sell insurance after that!