Shoutbox

Both, you never get one without the other. Volts are what hurt though, I'd imagine, as the power grid lines are all extremely high voltages(The voltage is stepped up through transformers upon leaving the power station and then stepped back down on the other end) and as you know, power lines hurt like a bitch and pretty much always kill you. Also, if you think about it, all signs say "Caution: High Voltage" etc, never "Caution: High Amperage"