On Sun, 7 Jun 2009 09:46:46 +0100, PeterC wrote:

I wondere if the line was DC, but when he stood up he was close to the
line and then he had to touch it so...

Others have mentioned DC or AC at 25kV. How far will 25Kv jump in dry air?
Note jump not sustain an arc once it has started.

The sound is of two bangs. Other arcs that I've seen on youtube etc on AC
systems have a definate buzz sound. Of course the explosive vaporisation
of body fluids will make quite a bang and could mask any AC buzz.

--
Cheers
Dave.