Obviously the writers know nothing about electricity. 1st off changing polarity of a rotary hammer does not create a short, it changes the direction of the drill itself (makes it go in reverse) most drills have a switch to do that very thing. In order to create what they were saying you would have to attach the load or the hot wire to the metal casing of the drill. 2nd GFIs do not use the grounding prong. They measure the current leaving and returning (the power and the common wires) if they don't match the GFI interrupts the current. Henceforth if there was any GFI in the circuit there would have been no electrocution. 3rd, they reference the car and a lightning storm. The rubber tires is an old wives tale, they provide no protection. When there is lightening there is also water, water carries many elements that conduct electricity. If you are in the car you are safe because electricity follows the easiest path, the metal body of the car which you are insulated from by the interior, just like a plane. And I might add, the whole metal frame and body is a ground.
Review of Overload
