I would be interested to know what, if any, emergency medical presence there is during this training. Might go to show what level of confidence they have in the true non-lethality of the weapons.
The big differince is where you are tased, and for how long. I have done taser training and we usually got it in the leg, rather than across the chest, as most deployments happen.
They also don't shoot people in the chest or let them fall onto concrete.
They should do the testing a 30 minute drive from the hospital without medical personnel on hand at the top of a flight of cement stairs with no one around to catch their fall.
I'm sure the police would not volunteer for that test.
As an electronic engineer, I've probably received more electric shocks than most people. It very much depends on where you get shocked, if you avoid the area around the heart then you could get away with it. It still hurts though.