I sympathize with those of us who have had high torque drills jerked out
of their hands; trust me, I know it hurts.

One thing that I didn't consider was the possibility of a drill bit
fracture.  This is a problem with some of the hardened drill bits.

I was using a Sears Titanium 3/8ths bit in a hefty 1/2 inch drill and
had the drill bit bind up in a piece of metal plate stock.  The motor
didn't tear out of my hands because the bit exploded into about 6
pieces.

One piece of the bit flew past my face missing my eyes by inches and
traveling to the ceiling of the garage shattering an 8 foot fluorescent
bulb.

Needless to say I have a new respect for drill bits and always wear
safety glasses now when drilling into metal.