Of course you can, with a bit of knowledge everything is able to be turned into a taser. Didn't you know that your Ipod got a capacity of 50 000 Volt. /facepalm.
Seriously, the voltage of transmission lines (Pic) are about 100 000 Volt, and those are supplying a little city. Common sense is advised
It's pathetic that some of theose people above me took this seriously.