I was in my teens working outside, shoeless, shirtless, shorts laying on the ground and operating a sander doing body work on the car with a bad commercial extension cord with a rectangular cross section. e.g.The 14 AWG wires in parallel molded together. Sorta, like trailer wiring ribbon cable, but thicker.
I caught the frayed end between my toes and could not let go and no one was home but me. No GFCI back then. So, the best thing I could do was to consciously SCREAM. That DIVERTED nerver impulses, so I could free myself. 120 VAC.
So now, the entire porch (source of some outside power) and the front yard receptacle have GFCI's. The kitchen and bath don't yet. A hair dryer that's used in the bathroom has a bulit-in GFCI. The house stall has fuses, but no pennys.
I won't do that again. Working on 13 kV DC systems at 1.5 A and 100 kV DC systems at 0.1 A and 1000 W tube transmitters leaves NO ROOM for error.