All the new cordless drill are plastic cased. Don’t really see how you could get shocked unless the drill was soaking wet.
the screws holding on the plastic can stop in metal.
I thought car coils were 40k volt vs. 20... but either will bite you for sure.
now the number of winds impact how high the voltage is, and a drill won’t be that high, but the collapse of the magnetic field works big time.
When I was a kid I put a 9volt batter across a relay coil and unplugged it and got nailed.... so I made a pulsing relay off a 555 IC that clicked it on and off twice a second, then put it in an
Plastic box with a couple 8 common nails across the circuit and took it to high school and dared people to hold on to it..
After a while we figured out we could shock across a dozen people and we’d get a person to touch a guys arm, while another touched their ear lobe... LOL !!!
Never ever let me get bored.