@Dj4n90 It's not the voltage, but the total power that matters. I've taken 10 kV across the back of my hand, and it hurt, but I sustained no injury because the amperage was so low. (~0.0009 A) = 9 W.

For reference, the electric chair (execution device) uses ~2 kV, but at ~5 A. = 10 kW (equivalent to a modest city-scale radio station, or well over a thousand running motor vehicles)

A typical electric fence, as used to herd lifestock or deter intruders, is ~7 kV @ 50 - 500 mA (= 350 - 3500 W).