Quote Originally Posted by Death BOO Z
massive sharingan usage
Regular Sharingan for a Uchiha user takes no or little chakra to use.

As for the Earth-Lightning thing, yeah, I'm pretty confused about it as well. My science is really bad, but here's what I think:

Quote Originally Posted by Wikipedia
A bolt of lightning can travel at a speed of 45 km/s (kilometres per second) (100,000 mph, 160,000 km/h). [4] It can reach temperatures approaching 28,000 °C (50,000 °F), hot enough to fuse soil or sand into glass channels.[5]

An average bolt of negative lightning carries an electric current of 40 kA (kiloamperes), although some bolts can be up to 120 kA, and transfers a charge of 5 coulombs and 500 MJ (megajoules), or enough energy to power a 100 watt lightbulb for just under two months. The voltage depends on the length of the bolt: with the dielectric breakdown of air being 3 million volts per meter, this works out at about one billion volts for a 300m (1,000 feet) lightning bolt.
First of all, that speed looks really fast (because it's light). Then, the obvious one factored here is the temperature...28,000°C. It can melt everything including the Earth's core made of iron (which is 5000°C). Of course, this fact might be wrong because Wikipedia isn't correct of all the time. Now that is a few thousand feet above us, so we don't feel anything from it. However, if you were to somehow convert it into Naruto version, Sasuke would be able to turn his body or chakra into a miniature-lightning technique that isn't as violent as mentioned on Wikipedia, but similar. Besides, because they weren't on the ground (unless the Clay Bird is accounted for), I guess you can say that Sasuke could have turned his own body into a Chidori so that he could neutralize the clays inside their body?

Not really sure about this considering it's a bad 5-minute theory I came up with, but that's what I think (which doesn't make any sense, considering lightning is neutralized once it hits the ground).

Source: http://en.wikipedia.org/wiki/Lightning