it has happened to me aswell, @ red barn and samrand/brooklyn. What i don't understand is the fact that your rubber isolates you from the ground, so it shouldn't be possible to discharge to the ground. So what happens is you body becomes like the secondary of an isolation transformer. There is high magnetic fields under those high voltage cables. They should have been higher or carry less power! The dry air makes this static charge condition even better. You charge up slightly and then when your hand or inside of leg almost makes contact with your bike, it discharges to the bike. i hate that feeling..
