I missed that, but it's also not all that surprising.
The first thing they do is attach the platform to the cable. They use the "wand thing" first, so that their hands are away from the inevitable sparks, and allow the platform he's sitting on to equalise (voltage wise) with the wire. In other words, he's sitting on a platform thats 10k or more volts! Once equalised, a hook is attached - this is also conductive.
Once the job is done, the wand thing comes back out - the hook is detached, without sparks as their is an alternative path for the electricity through the wand, and then the wand is slowly removed.
